#include<bits/stdc++.h> using namespace std;k int main(){ int a; cin>>n; switch(n) case 1: cout<<'31'<<endl;break; case 2:cout<<'29'<<endl;break; case 3: cout<<'31'<<endl;break; case 5: cout<<'31'<<endl;break; case 7: cout<<'31'<<endl;break; case 8: cout<<'31'<<endl;break; case 10: cout<<'31'<<endl;break; case 12: cout<<'31'<<endl;break; default : cout<<'30'<<endl;break; return 0; }