#39204: 邪教解法
110409@gs.hs.ntnu.edu.tw
(159520洪鈺承)
#include <bits/stdc++.h>
#include <math.h>
using namespace std;
int main(){
int n = 0, a = 0, b = 0;
cin >> n;
a = round(0.4472135955 * (pow(1.61803398875, n) - pow(-0.61803398875, n)));
b = round(0.4472135955 * (pow(1.61803398875, n+1) - pow(-0.61803398875, n+1)));
printf("%d:%d", a, b);
}