#include <stdio.h> #include using namespace std; int main() { int y,m; cin >> y >> m; int sum = 0; if(m1||m3||m5||m7||m8||m10||m==12) { sum = 31; } else if(m != 2) { sum = 30; } else { sum = 28; if (y%400 == 0||y%100 != 0 && y%4 == 0) sum += 1; } cout << sum; }