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