In-Code Stress

#include <bits/stdc++.h>

using namespace std;

mt19937 rnd(123);

int gen() {
    return rnd() % 100;
}

int smart(int n) {
    if (n % 12 == 0) {
        return 3; // uhh... stupid mistake!
    }
    return n * n;
}

int stupid(int n) {
    return n * n;
}

int check(int n, int smartans, int stupidans) {
    return smartans == stupidans;
}

int main() {
    for (int test = 0;; test++) {
        if (test % 1000000 == 0) {
            cout << "Running test # " << test << endl;
        }
        int n = gen();
        int smartans = smart(n);
        int stupidans = stupid(n);
        if (!check(n, smartans, stupidans)) { // here we may not use any checker
            cout << "Test found!" << endl << "n = " << n << ", smartans = " << smartans << ", stupidans = " << stupidans << endl;
            break;
        }
    }
    return 0;
}