Submission #1207577

#	Time	Username	Problem	Language	Result	Execution time	Memory
1207577		cheat_when_I_was_young	Hack (APIO25_hack)	C++17	Compilation error	0 ms	0 KiB

hack

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

int hack() {
    vector<long long> a;
    for (int i = 1; i <= 1000000; ++i) a.emplace_back(i);
    long long res = collisions(a);
    for (int n = 1; n <= 1000000; ++n) {
        int q = 1000000 / n;
        int r = 1000000 % n;
        long long val = (long long)q * (q - 1) / 2 * n + (long long)q * r;
        if (val == res) return n;
    }
    return -1;
}

Compilation message (stderr)

hack.cpp: In function 'int hack()':
hack.cpp:7:21: error: 'collisions' was not declared in this scope
    7 |     long long res = collisions(a);
      |                     ^~~~~~~~~~