恋爱纪念日

#include <iostream>
#include <string.h>
using namespace std;

int main() {
  int y, m, d, k;
  cin >> y >> m >> d >> k;
  int day[13] = {0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
  for (int i = 1; i <= k; i++) {
    if ((y % 400 == 0) || (y % 100 && y % 4 == 0)) {
      day[3] = 29;
    } else {
      day[3] = 28;
    }
    d++;
    if (d == day[m] + 1) {
      d = 1;
      m++;
    }
    if (m == 13) {
      m = 1;
      y++;
    }
  }
  printf("%4d-%02d-%02d\n", y, m, d);
  return 0;
}