12554 - A Special "Happy Birthday" Song!!!

#include <bits/stdc++.h>

using namespace std;

#define ll long long
#define endl '\n'
#define sz(x) int(x.size())
#define all(x) x.begin(), x.end()

int main() {
    ios_base::sync_with_stdio(0), cin.tie(0), cout.tie(0);
    int n;
    cin >> n;
    vector<string> names(n);
    for (int i = 0; i < n; i++) {
        cin >> names[i];
    }
    vector<string> song = {
        "Happy", "birthday", "to", "you",
        "Happy", "birthday", "to", "you",
        "Happy", "birthday", "to", "Rujia",
        "Happy", "birthday", "to", "you"
    };
    int m = sz(song);
    bool done = false;
    int i = 0;
    while (!done) {
        for (int j = 0; j < m; j++) {
            cout << names[i++] << ": " << song[j] << endl;
            i %= n;
            done |= (i == 0);
        }
    }
    return 0;
}