gistfile1.c

#include <stdio.h>
#include <stdlib.h>

int getID(int Fpass, int Fstop) {
  const int i = Fpass / 60;
  return (19 - i) * i / 2 + (Fstop - Fpass) / 60 - 1;
}
int main() {
  int Fpass, Fstop;
  const int begin = 0;
  const int end = 540;
  const int step = 60;
  for (Fpass = begin; Fpass <= end; Fpass += step) {
    for (Fstop = Fpass + step; Fstop <= end; Fstop += step) {
      printf("%d %d %d\n", Fpass, Fstop, getID(Fpass, Fstop));
    }
  }
  return 0;
}