# include<bits/stdc++.h>
using namespace std;
int main(){
    int a,b;
    cin>>a>>b;
    if(a%40==0||a%4==0){
        if(b==1||b==3||b==5||b==7||b==8||b==10||b==12)
        cout<<31;
        if(b==2)
        cout<<29;
        if(b==4||b==6||b==9||b==11)
        cout<<30;
    }
    if(a%40!=0||a%4!=0){
        if(b==1||b==3||b==5||b==7||b==8||b==10||b==12)
        cout<<31;
        if(b==2)
        cout<<28;
        if(b==4||b==6||b==9||b==11)
        cout<<30;
    }
    return 0;
}

只过了三个测试点求大佬改正