Question 20 — Biru

#include <iostream>
using namespace std;
int hijau(int a, int b) {
    while (a != b) {
        if (a > b) a -= b;
        else b -= a;
    }
    return a;
}
int merah(int q, int w, int e, int r) {
    int sum = 0;
    while (q >= w) {
        sum += hijau(q, e);
        q -= r;
    }
    return sum;
}
int biru(int n) {
    return 3 * (merah(n, 1, n, 1) - merah(2*n, 2, n, 2));
}
int main() {
    cout << biru(69) << endl;
    return 0;
}

Jawab: …………………………………………………… {tuliskan output program}