Submission #1256619

#	Time	Username	Problem	Language	Result	Execution time	Memory
1256619		bynix	Hack (APIO25_hack)	C++20	25 / 100	1145 ms	78816 KiB

hack

#include "hack.h"
#include "bits/stdc++.h"
using namespace std;
typedef long long ll;

map<ll, ll> m;
vector<ll> v;

ll sim(ll b, ll n){
  if (n <= b) return 0;
  ll q = n/b, r = n%b;
  return b * ((q * (q-1)) >> 1) + q * r;
}

int hack(){
  if (m.empty()){
    for (int b = 2; b <= 1e6; b++) m[sim(b, 1e6)] = b;
    for (int i = 1; i <= 1e6; i++) v.push_back(i);
  }
  return m[collisions(v)];
}

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