Problem M: 第几天——C语言初学者百题大战之十八

#include<stdio.h>
int main()
{
    int a,b,c,s;
    scanf("%d-%d-%d",&a,&b,&c);
    if((a%4==0&&a%100!=0)||(a%400==0))
    {
        if(b==1){
            s=c;
        }
        if(b==2){
            s=31+c;
        }
        if(b==3){
            s=31+29+c;
        }
        if(b==4){
            s=31+29+31+c;
        }
        if(b==5){
            s=31+29+31+30+c;
        }
        if(b==6){
            s=31+29+31+30+31+c;
        }
        if(b==7){
            s=31+29+31+30+31+30+c;
        }
        if(b==8){
            s=31+29+31+30+31+30+31+c;
        }
        if(b==9){
            s=31+29+31+30+31+30+31+31+c;
        }
        if(b==10){
            s=31+29+31+30+31+30+31+31+30+c;
        }
        if(b==11){
            s=31+29+31+30+31+30+31+31+30+31+c;
        }
        if(b==12){
            s=31+29+31+30+31+30+31+31+30+31+30+c;
        }
    }
    else
    {
        if(b==1){
            s=c;
        }
        if(b==2){
            s=31+c;
         }
        if(b==3){
            s=31+28+c;
        }
        if(b==4){
            s=31+28+31+c;
        }
        if(b==5){
            s=31+28+31+30+c;
        }
        if(b==6){
            s=31+28+31+30+31+c;
        }
        if(b==7){
            s=31+28+31+30+31+30+c;
        }
        if(b==8){
            s=31+28+31+30+31+30+31+c;
        }
        if(b==9){
            s=31+28+31+30+31+30+31+31+c;
        }
        if(b==10){
            s=31+28+31+30+31+30+31+31+30+c;
        }
        if(b==11){
            s=31+28+31+30+31+30+31+31+30+31+c;
        }
        if(b==12){
            s=31+28+31+30+31+30+31+31+30+31+30+c;
        }
}
    printf("%d",s);
    return 0;
}