B3835 [GESP202303 一级] 每月天数

yubowen0701 · 2025-09-27 19:47:33 · 题解

看到这一题很多dalao没做出来，本蒟蒻写了一篇，大佬勿喷

#include <bits/stdc++.h>
using namespace std;
int main (){
    int A, B;
    cin >> A >> B;
    if (B == 1 || B == 3 || B == 5 || B == 7 || B == 8 || B == 10 || B == 12)
    {
        cout << "31";
        return 0;
    }
    if (B == 4 || B == 6 || B == 9 || B == 11)
    {
        cout << "30";
        return 0;
    }
    if (A % 4 == 0 && A % 100 != 0 || A % 400 == 0) cout << "29";
    else cout << "28";
    return 0;
}