#include <stdio.h>

const int daysInMonth[12] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };

int main ()
{
   int dd, mm, yyyy, h, m, s, i;
   int ndays, nsecs;

   printf("Enter time (dd-mm-yyyy hh:mm:ss) : ");
   scanf("%d-%d-%d %d:%d:%d", &dd, &mm, &yyyy, &h, &m, &s);
   if (yyyy < 1970) { printf("Invalid year\n"); exit(1); }
   if ((mm <= 0) || (mm >= 13)) { printf("Invalid month\n"); exit(1); }
   ndays = daysInMonth[mm-1];
   if ((mm == 2) && (yyyy % 4 == 0)) ++ndays;
   if ((dd <= 0) || (dd > ndays)) { printf("Invalid date\n"); exit(1); }
   if ((h < 0) || (h >= 24)) { printf("Invalid hour\n"); exit(1); }
   if ((m < 0) || (m >= 60)) { printf("Invalid minute\n"); exit(1); }
   if ((s < 0) || (s >= 60)) { printf("Invalid second\n"); exit(1); }
   ndays = (yyyy - 1970) * 365;
   ndays += (yyyy - 1968) / 4;
   if ((yyyy % 4 == 0) && (mm <= 2)) --ndays;
   for (i=1; i<mm; ++i) ndays += daysInMonth[i-1];
   ndays += dd - 1;
   printf("Number of days from 01-01-1970             is %d\n", ndays);
   nsecs = ndays * 86400;
   nsecs += h * 3600;
   nsecs += m * 60;
   nsecs += s;
   printf("Number of seconds from 01-01-1970 00:00:00 is %d\n", nsecs);
}