题解 | #获得月份天数#

#include <stdio.h>

int main() { int a, b; int arr[13] = { 0,31,28,31,30,31,30,31,31,30,31,30,31 }; while ((scanf("%d%d", &a, &b)) != EOF) {

    int day = arr[b];
    if ((a % 4 == 0 && a % 100 != 0) || (a % 400 == 0))
    {
        
        if (b == 2)
        {
            day += 1;
        }
    }
    printf("%d\n",day);
}
return 0;

}