#include <iostream>
using namespace std;
int main() {
    int celeb = 0;
    for(int i=1;i<n;++i)
        if(ask(celeb, i) == false)     //imagine you have a finction ask, which tell you the answer for question ask(a, b). if b know a it returns true
            celeb = i;
            
    bool flag = true;
    for(int i=0;i<n;++i)
        if(celeb != i && ask(celeb, i) == false)
            flag = false;
    
    if(flag == true)
        cout << "We find it!! celebrity is: " << celeb + 1 << endl;
    else
        cout << "There is no celebrity :(" << endl;
        
    return 0;
}