# include<iostream> # include<iomanip> using namespace std; int main(){ int n; cin>>n; if(n==1 || n==3 || n==5 || n==7 || n==8 || n==10 || n==12){ cout<<"31"; } else if(n==4 || n==6 || n==9 || n==11){ cout<<"30"; } else if(n==2){ cout<<"29"; } return 0; }