1   │ #include <stdio.h>
   2   │ #include <time.h>
   3   │ #include <stdint.h>
   4   │ #include <limits.h>
   5   │
   6   │ enum { DATE_SIZE = 20 };
   7   │
   8   │ int main() {
   9   │     time_t rawtime, today;
  10   │     struct tm *info;
  11   │     time(&today);
  12   │
  13   │     int64_t delta;
  14   │     while (scanf("%lld", &delta) != EOF) {
  15   │         int64_t tmp = delta * 24 * 60 * 60;
  16   │         if (tmp < INT32_MIN || tmp > INT32_MAX) {
  17   │             printf("OVERFLOW\n");
  18   │             continue;
  19   │         }
  20   │         tmp += today;
  21   │         if (tmp < INT32_MIN || tmp > INT32_MAX) {
  22   │             printf("OVERFLOW\n");
  23   │             continue;
  24   │         }
  25   │
  26   │         rawtime = tmp;
  27   │         info = localtime(&rawtime);
  28   │         char buf[DATE_SIZE];
  29   │         strftime(buf, DATE_SIZE, "%Y-%m-%d", info);
  30   │         printf("%s\n", buf);
  31   │     }
  32   │ }

   1   │ #include <stdio.h>
   2   │ #include <time.h>
   3   │ #include <stdint.h>
   4   │ #include <limits.h>
   5   │ #include <stdlib.h>
   6   │ #include <sys/types.h>
   7   │ #include <sys/stat.h>
   8   │ #include <fcntl.h>
   9   │ #include <unistd.h>
  10   │
  11   │ int main() {
  12   │     struct tm *info = malloc(sizeof(struct tm));
  13   │
  14   │     FILE* ptr = fopen("input.txt", "r");
  15   │     if (ptr == NULL) {
  16   │         exit(1);
  17   │     }
  18   │
  19   │     int year, month, day, hour, min, sec;
  20   │     int first_time = 1;
  21   │     int64_t last_time;
  22   │     while (fscanf(ptr, "%d/%02d/%02d%02d:%02d:%02d", &year, &month, &day, &hour, &min, &sec) != EOF) {
  23   │         info->tm_year = year - 1900;
  24   │         info->tm_mon = month - 1;
  25   │         info->tm_mday = day;
  26   │         info->tm_hour = hour;
  27   │         info->tm_min = min;
  28   │         info->tm_sec = sec;
  29   │         info->tm_isdst = -1;
  30   │         int64_t now = mktime(info);
  31   │         if (!first_time) {
  32   │             printf("%lld\n", now - last_time);
  33   │         } else {
  34   │             first_time = 0;
  35   │         }
  36   │         last_time = now;
  37   │     }
  38   │
  39   │     fclose(ptr);
  40   │     free(info);
  41   │ }