题解 | #获得月份天数#

#include <stdio.h>
int main()
{
    int y = 0;
    int m = 0;
    int days[12] = {31,28,31,30,31,30,31,31,30,31,30,31}; 
    while(scanf("%d%d", &y, &m) != EOF)
    {
        int day = days[m-1];
        if((y%4==0 && y%100!=0) || (y%400==0))
        {
            if(m == 2)
                day += 1;
        }
        printf("%d\n", day);
    }
    return 0;
}