Submission #1361087

#	Time	Username	Problem	Language	Result	Execution time	Memory
1361087		isct	Hack (APIO25_hack)	C++20	25 / 100	811 ms	16472 KiB

hack

#include "hack.h"
#include <vector>
#include <bits/stdc++.h>
using namespace std;

vector<long long> make_vec(long long last)
{
    vector<long long> res = {};
    for (long long i = 1; i <= last; i++)
    {
        res.push_back(i);
    }
    return res;
}

int hack()
{
    vector<long long> x = make_vec(1e6);

    long long predicted = 0;
    long long a = collisions(x);
    for (long long i = 2; i <= 1e6; i++)
    {
        long long k = 1e6 / i;
        predicted = i * k * (k - 1) / 2;
        predicted += (k) * (1e6 - i * k);
        if (a == predicted)
            return i;
    }
}

Compilation message (stderr)

hack.cpp: In function 'int hack()':
hack.cpp:30:1: warning: control reaches end of non-void function [-Wreturn-type]
   30 | }
      | ^

• Subtask 0: 0 / 0
• Subtask 1: 8 / 8
• Subtask 2: 17 / 17
• Subtask 3: 0 / 75