【Codeforces Round #459 (Div. 2) A】Eleven

#include <bits/stdc++.h>
using namespace std;

int n;

bool ff(int x){
    if (x==1) return true;
    int a = 1,b = 1,c=a+b;
    while (c<=x){
        if (c==x){
            return 1;
        }
        a = b,b = c;
        c = a+b;
    }
    return 0;
}

int main(){
    #ifdef LOCAL_DEFINE
        freopen("rush_in.txt", "r", stdin);
    #endif
    ios::sync_with_stdio(0),cin.tie(0);
    cin >> n;
    for (int i = 1;i <= n;i++)
        if (ff(i))
            cout<<"O";
        else

            cout<<"o";
    return 0;
}