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#include <stdio.h>

int main() {
  int x, d, h, m;
  scanf("%d %d %d %d", &x, &d, &h, &m);
  int k = 0;
  switch(x) {
    case 1:
      k = 24*24*60;
      break;
    case 2:
      k = 25*24*60;
      break;
    case 3:
      k = 26*24*60;
      break;
    case 4:
      k = 27*24*60;
      break;
    case 5:
      k = 29*24*60;
      if(!(d==29 && h >= 3)) {
        k -= 60;
      }
      break;
  }
  int cz = k - ((d-1)*24*60+h*60+m);
  printf("%d\n", cz);
  return 0;
}