Online Judge System For SzNOI 题库 语法百题 C++ d017

#include <stdio.h>

int main(){

int yea,mon;

scanf("%d %d",&yea,&mon);

if(mon==2){

if(yea%4==0&&yea%100!=0||yea%400==0)

printf("29\n");

else printf("28\n");

}

else {

if(mon==1||mon==3||mon==5||mon==7||mon==8||mon==10||mon==12)

printf("31\n");

else printf("30\n");

}

}