Submission #1207081

#	Time	Username	Problem	Language	Result	Execution time	Memory
1207081		alterio	Hack (APIO25_hack)	C++20	25 / 100	134 ms	1344 KiB

hack

#include "hack.h"
#include <bits/stdc++.h>

using namespace std;

#define ll long long

bool ask(ll x) {
    vector<ll> v;
    ll k = sqrt(x);
    for (ll i = 1; i < k; i++) v.push_back(i);
    for (ll i = k; i <= x; i += k) v.push_back(i);
    if (v.back() != x) v.push_back(x);
    return collisions(v) > 0;
}

int hack() {
    ll l = 1, r = 1e9 + 1;
    while (l + 1 < r) {
        ll mid = (l + r) / 2;
        if (ask(mid)) r = mid;
        else l = mid;
    }
    return r - 1;
}

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