题解 | #获得月份天数#

#include <stdio.h>
int main()
{
	int y=0;
    int m=0;
    int i=0;
    int arr1[13]={0,31,29,31,30,31,30,31,31,30,31,30,31};
    int arr2[13]={0,31,28,31,30,31,30,31,31,30,31,30,31};
    while(scanf("%d%d",&y,&m)!=EOF)
    {
        if(y%4==0&&y%100!=0||y%400==0)
    {
        printf("%d\n",arr1[m]);
    }
    else
    {
        printf("%d\n",arr2[m]);
    }
    }
    
	return 0;
}