Submission #1353421

#	Time	Username	Problem	Language	Result	Execution time	Memory
1353421		MunkhErdene	Hack (APIO25_hack)	C++17	25 / 100	805 ms	16472 KiB

hack

#include <bits/stdc++.h>
#include "hack.h"
using namespace std;
using ll = long long;
int hack(){
    ll n = 1e6;
    vector<ll> x;
    for(ll i=1; i<=n; i++) x.push_back(i);
    ll v=collisions(x);
    for(ll i=1; i<=n; i++){
        ll f=n/i;
        ll a=f*(f-1)/2*i;
        a+=n%i*f;
        if(a==v) return i;
    }
}

Compilation message (stderr)

hack.cpp: In function 'int hack()':
hack.cpp:16:1: warning: control reaches end of non-void function [-Wreturn-type]
   16 | }
      | ^

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