#include <iostream> using namespace std; int main(){ int a; cin>>a; switch(a/10){ case 0,1:cout<<"1"<<endl;break; case 0,2:cout<<"2"<<endl;break; case 1,0:cout<<"2"<<endl;break; case 2,0:cout<<"1"<<endl;break; case 1,2:cout<<"1"<<endl;break; case 2,1:cout<<"2"<<endl;break; default: cout<<"1,2"<<endl;break; }