How many persons? 8 i = 0, code = 00000000, Persons inside : i = 1, k = 0, Person 0 enters room, code = 00000001, Persons inside : 0 i = 2, k = 1, Person 1 enters room, code = 00000011, Persons inside : 10 i = 3, k = 0, Person 0 leaves room, code = 00000010, Persons inside : 1 i = 4, k = 2, Person 2 enters room, code = 00000110, Persons inside : 21 i = 5, k = 0, Person 0 enters room, code = 00000111, Persons inside : 210 i = 6, k = 1, Person 1 leaves room, code = 00000101, Persons inside : 20 i = 7, k = 0, Person 0 leaves room, code = 00000100, Persons inside : 2 i = 8, k = 3, Person 3 enters room, code = 00001100, Persons inside : 32 i = 9, k = 0, Person 0 enters room, code = 00001101, Persons inside : 320 i = 10, k = 1, Person 1 enters room, code = 00001111, Persons inside : 3210 i = 11, k = 0, Person 0 leaves room, code = 00001110, Persons inside : 321 i = 12, k = 2, Person 2 leaves room, code = 00001010, Persons inside : 31 i = 13, k = 0, Person 0 enters room, code = 00001011, Persons inside : 310 i = 14, k = 1, Person 1 leaves room, code = 00001001, Persons inside : 30 i = 15, k = 0, Person 0 leaves room, code = 00001000, Persons inside : 3 i = 16, k = 4, Person 4 enters room, code = 00011000, Persons inside : 43 i = 17, k = 0, Person 0 enters room, code = 00011001, Persons inside : 430 i = 18, k = 1, Person 1 enters room, code = 00011011, Persons inside : 4310 i = 19, k = 0, Person 0 leaves room, code = 00011010, Persons inside : 431 i = 20, k = 2, Person 2 enters room, code = 00011110, Persons inside : 4321 i = 21, k = 0, Person 0 enters room, code = 00011111, Persons inside : 43210 i = 22, k = 1, Person 1 leaves room, code = 00011101, Persons inside : 4320 i = 23, k = 0, Person 0 leaves room, code = 00011100, Persons inside : 432 i = 24, k = 3, Person 3 leaves room, code = 00010100, Persons inside : 42 i = 25, k = 0, Person 0 enters room, code = 00010101, Persons inside : 420 i = 26, k = 1, Person 1 enters room, code = 00010111, Persons inside : 4210 i = 27, k = 0, Person 0 leaves room, code = 00010110, Persons inside : 421 i = 28, k = 2, Person 2 leaves room, code = 00010010, Persons inside : 41 i = 29, k = 0, Person 0 enters room, code = 00010011, Persons inside : 410 i = 30, k = 1, Person 1 leaves room, code = 00010001, Persons inside : 40 i = 31, k = 0, Person 0 leaves room, code = 00010000, Persons inside : 4 i = 32, k = 5, Person 5 enters room, code = 00110000, Persons inside : 54 i = 33, k = 0, Person 0 enters room, code = 00110001, Persons inside : 540 i = 34, k = 1, Person 1 enters room, code = 00110011, Persons inside : 5410 i = 35, k = 0, Person 0 leaves room, code = 00110010, Persons inside : 541 i = 36, k = 2, Person 2 enters room, code = 00110110, Persons inside : 5421 i = 37, k = 0, Person 0 enters room, code = 00110111, Persons inside : 54210 i = 38, k = 1, Person 1 leaves room, code = 00110101, Persons inside : 5420 i = 39, k = 0, Person 0 leaves room, code = 00110100, Persons inside : 542 i = 40, k = 3, Person 3 enters room, code = 00111100, Persons inside : 5432 i = 41, k = 0, Person 0 enters room, code = 00111101, Persons inside : 54320 i = 42, k = 1, Person 1 enters room, code = 00111111, Persons inside : 543210 i = 43, k = 0, Person 0 leaves room, code = 00111110, Persons inside : 54321 i = 44, k = 2, Person 2 leaves room, code = 00111010, Persons inside : 5431 i = 45, k = 0, Person 0 enters room, code = 00111011, Persons inside : 54310 i = 46, k = 1, Person 1 leaves room, code = 00111001, Persons inside : 5430 i = 47, k = 0, Person 0 leaves room, code = 00111000, Persons inside : 543 i = 48, k = 4, Person 4 leaves room, code = 00101000, Persons inside : 53 i = 49, k = 0, Person 0 enters room, code = 00101001, Persons inside : 530 i = 50, k = 1, Person 1 enters room, code = 00101011, Persons inside : 5310 i = 51, k = 0, Person 0 leaves room, code = 00101010, Persons inside : 531 i = 52, k = 2, Person 2 enters room, code = 00101110, Persons inside : 5321 i = 53, k = 0, Person 0 enters room, code = 00101111, Persons inside : 53210 i = 54, k = 1, Person 1 leaves room, code = 00101101, Persons inside : 5320 i = 55, k = 0, Person 0 leaves room, code = 00101100, Persons inside : 532 i = 56, k = 3, Person 3 leaves room, code = 00100100, Persons inside : 52 i = 57, k = 0, Person 0 enters room, code = 00100101, Persons inside : 520 i = 58, k = 1, Person 1 enters room, code = 00100111, Persons inside : 5210 i = 59, k = 0, Person 0 leaves room, code = 00100110, Persons inside : 521 i = 60, k = 2, Person 2 leaves room, code = 00100010, Persons inside : 51 i = 61, k = 0, Person 0 enters room, code = 00100011, Persons inside : 510 i = 62, k = 1, Person 1 leaves room, code = 00100001, Persons inside : 50 i = 63, k = 0, Person 0 leaves room, code = 00100000, Persons inside : 5 i = 64, k = 6, Person 6 enters room, code = 01100000, Persons inside : 65 i = 65, k = 0, Person 0 enters room, code = 01100001, Persons inside : 650 i = 66, k = 1, Person 1 enters room, code = 01100011, Persons inside : 6510 i = 67, k = 0, Person 0 leaves room, code = 01100010, Persons inside : 651 i = 68, k = 2, Person 2 enters room, code = 01100110, Persons inside : 6521 i = 69, k = 0, Person 0 enters room, code = 01100111, Persons inside : 65210 i = 70, k = 1, Person 1 leaves room, code = 01100101, Persons inside : 6520 i = 71, k = 0, Person 0 leaves room, code = 01100100, Persons inside : 652 i = 72, k = 3, Person 3 enters room, code = 01101100, Persons inside : 6532 i = 73, k = 0, Person 0 enters room, code = 01101101, Persons inside : 65320 i = 74, k = 1, Person 1 enters room, code = 01101111, Persons inside : 653210 i = 75, k = 0, Person 0 leaves room, code = 01101110, Persons inside : 65321 i = 76, k = 2, Person 2 leaves room, code = 01101010, Persons inside : 6531 i = 77, k = 0, Person 0 enters room, code = 01101011, Persons inside : 65310 i = 78, k = 1, Person 1 leaves room, code = 01101001, Persons inside : 6530 i = 79, k = 0, Person 0 leaves room, code = 01101000, Persons inside : 653 i = 80, k = 4, Person 4 enters room, code = 01111000, Persons inside : 6543 i = 81, k = 0, Person 0 enters room, code = 01111001, Persons inside : 65430 i = 82, k = 1, Person 1 enters room, code = 01111011, Persons inside : 654310 i = 83, k = 0, Person 0 leaves room, code = 01111010, Persons inside : 65431 i = 84, k = 2, Person 2 enters room, code = 01111110, Persons inside : 654321 i = 85, k = 0, Person 0 enters room, code = 01111111, Persons inside : 6543210 i = 86, k = 1, Person 1 leaves room, code = 01111101, Persons inside : 654320 i = 87, k = 0, Person 0 leaves room, code = 01111100, Persons inside : 65432 i = 88, k = 3, Person 3 leaves room, code = 01110100, Persons inside : 6542 i = 89, k = 0, Person 0 enters room, code = 01110101, Persons inside : 65420 i = 90, k = 1, Person 1 enters room, code = 01110111, Persons inside : 654210 i = 91, k = 0, Person 0 leaves room, code = 01110110, Persons inside : 65421 i = 92, k = 2, Person 2 leaves room, code = 01110010, Persons inside : 6541 i = 93, k = 0, Person 0 enters room, code = 01110011, Persons inside : 65410 i = 94, k = 1, Person 1 leaves room, code = 01110001, Persons inside : 6540 i = 95, k = 0, Person 0 leaves room, code = 01110000, Persons inside : 654 i = 96, k = 5, Person 5 leaves room, code = 01010000, Persons inside : 64 i = 97, k = 0, Person 0 enters room, code = 01010001, Persons inside : 640 i = 98, k = 1, Person 1 enters room, code = 01010011, Persons inside : 6410 i = 99, k = 0, Person 0 leaves room, code = 01010010, Persons inside : 641 i = 100, k = 2, Person 2 enters room, code = 01010110, Persons inside : 6421 i = 101, k = 0, Person 0 enters room, code = 01010111, Persons inside : 64210 i = 102, k = 1, Person 1 leaves room, code = 01010101, Persons inside : 6420 i = 103, k = 0, Person 0 leaves room, code = 01010100, Persons inside : 642 i = 104, k = 3, Person 3 enters room, code = 01011100, Persons inside : 6432 i = 105, k = 0, Person 0 enters room, code = 01011101, Persons inside : 64320 i = 106, k = 1, Person 1 enters room, code = 01011111, Persons inside : 643210 i = 107, k = 0, Person 0 leaves room, code = 01011110, Persons inside : 64321 i = 108, k = 2, Person 2 leaves room, code = 01011010, Persons inside : 6431 i = 109, k = 0, Person 0 enters room, code = 01011011, Persons inside : 64310 i = 110, k = 1, Person 1 leaves room, code = 01011001, Persons inside : 6430 i = 111, k = 0, Person 0 leaves room, code = 01011000, Persons inside : 643 i = 112, k = 4, Person 4 leaves room, code = 01001000, Persons inside : 63 i = 113, k = 0, Person 0 enters room, code = 01001001, Persons inside : 630 i = 114, k = 1, Person 1 enters room, code = 01001011, Persons inside : 6310 i = 115, k = 0, Person 0 leaves room, code = 01001010, Persons inside : 631 i = 116, k = 2, Person 2 enters room, code = 01001110, Persons inside : 6321 i = 117, k = 0, Person 0 enters room, code = 01001111, Persons inside : 63210 i = 118, k = 1, Person 1 leaves room, code = 01001101, Persons inside : 6320 i = 119, k = 0, Person 0 leaves room, code = 01001100, Persons inside : 632 i = 120, k = 3, Person 3 leaves room, code = 01000100, Persons inside : 62 i = 121, k = 0, Person 0 enters room, code = 01000101, Persons inside : 620 i = 122, k = 1, Person 1 enters room, code = 01000111, Persons inside : 6210 i = 123, k = 0, Person 0 leaves room, code = 01000110, Persons inside : 621 i = 124, k = 2, Person 2 leaves room, code = 01000010, Persons inside : 61 i = 125, k = 0, Person 0 enters room, code = 01000011, Persons inside : 610 i = 126, k = 1, Person 1 leaves room, code = 01000001, Persons inside : 60 i = 127, k = 0, Person 0 leaves room, code = 01000000, Persons inside : 6 i = 128, k = 7, Person 7 enters room, code = 11000000, Persons inside : 76 i = 129, k = 0, Person 0 enters room, code = 11000001, Persons inside : 760 i = 130, k = 1, Person 1 enters room, code = 11000011, Persons inside : 7610 i = 131, k = 0, Person 0 leaves room, code = 11000010, Persons inside : 761 i = 132, k = 2, Person 2 enters room, code = 11000110, Persons inside : 7621 i = 133, k = 0, Person 0 enters room, code = 11000111, Persons inside : 76210 i = 134, k = 1, Person 1 leaves room, code = 11000101, Persons inside : 7620 i = 135, k = 0, Person 0 leaves room, code = 11000100, Persons inside : 762 i = 136, k = 3, Person 3 enters room, code = 11001100, Persons inside : 7632 i = 137, k = 0, Person 0 enters room, code = 11001101, Persons inside : 76320 i = 138, k = 1, Person 1 enters room, code = 11001111, Persons inside : 763210 i = 139, k = 0, Person 0 leaves room, code = 11001110, Persons inside : 76321 i = 140, k = 2, Person 2 leaves room, code = 11001010, Persons inside : 7631 i = 141, k = 0, Person 0 enters room, code = 11001011, Persons inside : 76310 i = 142, k = 1, Person 1 leaves room, code = 11001001, Persons inside : 7630 i = 143, k = 0, Person 0 leaves room, code = 11001000, Persons inside : 763 i = 144, k = 4, Person 4 enters room, code = 11011000, Persons inside : 7643 i = 145, k = 0, Person 0 enters room, code = 11011001, Persons inside : 76430 i = 146, k = 1, Person 1 enters room, code = 11011011, Persons inside : 764310 i = 147, k = 0, Person 0 leaves room, code = 11011010, Persons inside : 76431 i = 148, k = 2, Person 2 enters room, code = 11011110, Persons inside : 764321 i = 149, k = 0, Person 0 enters room, code = 11011111, Persons inside : 7643210 i = 150, k = 1, Person 1 leaves room, code = 11011101, Persons inside : 764320 i = 151, k = 0, Person 0 leaves room, code = 11011100, Persons inside : 76432 i = 152, k = 3, Person 3 leaves room, code = 11010100, Persons inside : 7642 i = 153, k = 0, Person 0 enters room, code = 11010101, Persons inside : 76420 i = 154, k = 1, Person 1 enters room, code = 11010111, Persons inside : 764210 i = 155, k = 0, Person 0 leaves room, code = 11010110, Persons inside : 76421 i = 156, k = 2, Person 2 leaves room, code = 11010010, Persons inside : 7641 i = 157, k = 0, Person 0 enters room, code = 11010011, Persons inside : 76410 i = 158, k = 1, Person 1 leaves room, code = 11010001, Persons inside : 7640 i = 159, k = 0, Person 0 leaves room, code = 11010000, Persons inside : 764 i = 160, k = 5, Person 5 enters room, code = 11110000, Persons inside : 7654 i = 161, k = 0, Person 0 enters room, code = 11110001, Persons inside : 76540 i = 162, k = 1, Person 1 enters room, code = 11110011, Persons inside : 765410 i = 163, k = 0, Person 0 leaves room, code = 11110010, Persons inside : 76541 i = 164, k = 2, Person 2 enters room, code = 11110110, Persons inside : 765421 i = 165, k = 0, Person 0 enters room, code = 11110111, Persons inside : 7654210 i = 166, k = 1, Person 1 leaves room, code = 11110101, Persons inside : 765420 i = 167, k = 0, Person 0 leaves room, code = 11110100, Persons inside : 76542 i = 168, k = 3, Person 3 enters room, code = 11111100, Persons inside : 765432 i = 169, k = 0, Person 0 enters room, code = 11111101, Persons inside : 7654320 i = 170, k = 1, Person 1 enters room, code = 11111111, Persons inside : 76543210 i = 171, k = 0, Person 0 leaves room, code = 11111110, Persons inside : 7654321 i = 172, k = 2, Person 2 leaves room, code = 11111010, Persons inside : 765431 i = 173, k = 0, Person 0 enters room, code = 11111011, Persons inside : 7654310 i = 174, k = 1, Person 1 leaves room, code = 11111001, Persons inside : 765430 i = 175, k = 0, Person 0 leaves room, code = 11111000, Persons inside : 76543 i = 176, k = 4, Person 4 leaves room, code = 11101000, Persons inside : 7653 i = 177, k = 0, Person 0 enters room, code = 11101001, Persons inside : 76530 i = 178, k = 1, Person 1 enters room, code = 11101011, Persons inside : 765310 i = 179, k = 0, Person 0 leaves room, code = 11101010, Persons inside : 76531 i = 180, k = 2, Person 2 enters room, code = 11101110, Persons inside : 765321 i = 181, k = 0, Person 0 enters room, code = 11101111, Persons inside : 7653210 i = 182, k = 1, Person 1 leaves room, code = 11101101, Persons inside : 765320 i = 183, k = 0, Person 0 leaves room, code = 11101100, Persons inside : 76532 i = 184, k = 3, Person 3 leaves room, code = 11100100, Persons inside : 7652 i = 185, k = 0, Person 0 enters room, code = 11100101, Persons inside : 76520 i = 186, k = 1, Person 1 enters room, code = 11100111, Persons inside : 765210 i = 187, k = 0, Person 0 leaves room, code = 11100110, Persons inside : 76521 i = 188, k = 2, Person 2 leaves room, code = 11100010, Persons inside : 7651 i = 189, k = 0, Person 0 enters room, code = 11100011, Persons inside : 76510 i = 190, k = 1, Person 1 leaves room, code = 11100001, Persons inside : 7650 i = 191, k = 0, Person 0 leaves room, code = 11100000, Persons inside : 765 i = 192, k = 6, Person 6 leaves room, code = 10100000, Persons inside : 75 i = 193, k = 0, Person 0 enters room, code = 10100001, Persons inside : 750 i = 194, k = 1, Person 1 enters room, code = 10100011, Persons inside : 7510 i = 195, k = 0, Person 0 leaves room, code = 10100010, Persons inside : 751 i = 196, k = 2, Person 2 enters room, code = 10100110, Persons inside : 7521 i = 197, k = 0, Person 0 enters room, code = 10100111, Persons inside : 75210 i = 198, k = 1, Person 1 leaves room, code = 10100101, Persons inside : 7520 i = 199, k = 0, Person 0 leaves room, code = 10100100, Persons inside : 752 i = 200, k = 3, Person 3 enters room, code = 10101100, Persons inside : 7532 i = 201, k = 0, Person 0 enters room, code = 10101101, Persons inside : 75320 i = 202, k = 1, Person 1 enters room, code = 10101111, Persons inside : 753210 i = 203, k = 0, Person 0 leaves room, code = 10101110, Persons inside : 75321 i = 204, k = 2, Person 2 leaves room, code = 10101010, Persons inside : 7531 i = 205, k = 0, Person 0 enters room, code = 10101011, Persons inside : 75310 i = 206, k = 1, Person 1 leaves room, code = 10101001, Persons inside : 7530 i = 207, k = 0, Person 0 leaves room, code = 10101000, Persons inside : 753 i = 208, k = 4, Person 4 enters room, code = 10111000, Persons inside : 7543 i = 209, k = 0, Person 0 enters room, code = 10111001, Persons inside : 75430 i = 210, k = 1, Person 1 enters room, code = 10111011, Persons inside : 754310 i = 211, k = 0, Person 0 leaves room, code = 10111010, Persons inside : 75431 i = 212, k = 2, Person 2 enters room, code = 10111110, Persons inside : 754321 i = 213, k = 0, Person 0 enters room, code = 10111111, Persons inside : 7543210 i = 214, k = 1, Person 1 leaves room, code = 10111101, Persons inside : 754320 i = 215, k = 0, Person 0 leaves room, code = 10111100, Persons inside : 75432 i = 216, k = 3, Person 3 leaves room, code = 10110100, Persons inside : 7542 i = 217, k = 0, Person 0 enters room, code = 10110101, Persons inside : 75420 i = 218, k = 1, Person 1 enters room, code = 10110111, Persons inside : 754210 i = 219, k = 0, Person 0 leaves room, code = 10110110, Persons inside : 75421 i = 220, k = 2, Person 2 leaves room, code = 10110010, Persons inside : 7541 i = 221, k = 0, Person 0 enters room, code = 10110011, Persons inside : 75410 i = 222, k = 1, Person 1 leaves room, code = 10110001, Persons inside : 7540 i = 223, k = 0, Person 0 leaves room, code = 10110000, Persons inside : 754 i = 224, k = 5, Person 5 leaves room, code = 10010000, Persons inside : 74 i = 225, k = 0, Person 0 enters room, code = 10010001, Persons inside : 740 i = 226, k = 1, Person 1 enters room, code = 10010011, Persons inside : 7410 i = 227, k = 0, Person 0 leaves room, code = 10010010, Persons inside : 741 i = 228, k = 2, Person 2 enters room, code = 10010110, Persons inside : 7421 i = 229, k = 0, Person 0 enters room, code = 10010111, Persons inside : 74210 i = 230, k = 1, Person 1 leaves room, code = 10010101, Persons inside : 7420 i = 231, k = 0, Person 0 leaves room, code = 10010100, Persons inside : 742 i = 232, k = 3, Person 3 enters room, code = 10011100, Persons inside : 7432 i = 233, k = 0, Person 0 enters room, code = 10011101, Persons inside : 74320 i = 234, k = 1, Person 1 enters room, code = 10011111, Persons inside : 743210 i = 235, k = 0, Person 0 leaves room, code = 10011110, Persons inside : 74321 i = 236, k = 2, Person 2 leaves room, code = 10011010, Persons inside : 7431 i = 237, k = 0, Person 0 enters room, code = 10011011, Persons inside : 74310 i = 238, k = 1, Person 1 leaves room, code = 10011001, Persons inside : 7430 i = 239, k = 0, Person 0 leaves room, code = 10011000, Persons inside : 743 i = 240, k = 4, Person 4 leaves room, code = 10001000, Persons inside : 73 i = 241, k = 0, Person 0 enters room, code = 10001001, Persons inside : 730 i = 242, k = 1, Person 1 enters room, code = 10001011, Persons inside : 7310 i = 243, k = 0, Person 0 leaves room, code = 10001010, Persons inside : 731 i = 244, k = 2, Person 2 enters room, code = 10001110, Persons inside : 7321 i = 245, k = 0, Person 0 enters room, code = 10001111, Persons inside : 73210 i = 246, k = 1, Person 1 leaves room, code = 10001101, Persons inside : 7320 i = 247, k = 0, Person 0 leaves room, code = 10001100, Persons inside : 732 i = 248, k = 3, Person 3 leaves room, code = 10000100, Persons inside : 72 i = 249, k = 0, Person 0 enters room, code = 10000101, Persons inside : 720 i = 250, k = 1, Person 1 enters room, code = 10000111, Persons inside : 7210 i = 251, k = 0, Person 0 leaves room, code = 10000110, Persons inside : 721 i = 252, k = 2, Person 2 leaves room, code = 10000010, Persons inside : 71 i = 253, k = 0, Person 0 enters room, code = 10000011, Persons inside : 710 i = 254, k = 1, Person 1 leaves room, code = 10000001, Persons inside : 70 i = 255, k = 0, Person 0 leaves room, code = 10000000, Persons inside : 7