题解 | 今年的第几天？

#include<iostream>
#include<cstdio>
using namespace std;
int days(int Y,int M,int D){
    int arr[] = {31,28,31,30,31,30,31,31,30,31,30,31};
    if(Y%400 == 0 || Y%4==0&&Y%100 != 0){
        arr[1] = 29;
    }
    int rs =0;
  //计算距本年1月1日的天数
    for(int j=1;j<M;j++){
        rs +=arr[j-1];
    }
    rs += D;
    return rs;
}
int main(){
    int Y;
    int M;
    int D;
    while(scanf("%d %d %d",&Y,&M,&D) != EOF){
        int temp =0;
        temp = days(Y,M,D);
        cout<<temp<<endl;
    }
    return 0;
}