今年的第几天

                 本文链接：[https://blog.csdn.net/weixin\_42449444/article/details/102078866](https://blog.csdn.net/weixin_42449444/article/details/102078866) 

#include <bits/stdc++.h>
using namespace std;
#define Up(i,a,b) for(int i = a; i <= b; i++)

int main()
{
    int a[13] = {0,31,28,31,30,31,30,31,31,30,31,30,31};
    int y,m,d; 
    cin >> y >> m >> d;
    int cnt = 0;   //本年的第几天  
    if((y%4==0&&y%100!=0) || y%400==0) //闰年
    {
        a[2]++;   //2月有29天
    }
    Up(i,1,m-1)
    {
        cnt += a[i];
    }
    cnt += d;
    cout << cnt << endl;
    return 0;
}