Submission #1327957

#	Time	Username	Problem	Language	Result	Execution time	Memory
1327957		idonoam	Hack (APIO25_hack)	C++20	0 / 100	11 ms	1204 KiB

hack

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


ll isbet(ll a, ll b)
{
    ll c = (ll)sqrt(b - a);
    vector<ll> vec;
    for (ll i = 1; i <= c; i++)
    {
        vec.push_back(i);
    }
    for (ll i = a + c; i <= b; i += c)
    {
        vec.push_back(i);
    }
    vec.push_back(b+1);
    return collisions(vec);
}
int hack()
{
    ll mx = 1e9;
    ll mn = 1;
    while (mx > mn + 7)
    {
        ll c = (mx + mn) / 2;
        if (isbet(mn,c))
        {
            mx =c;
        }
        else
        {
            mn = c + 1;
        }
    }
    for (ll i = mn; i < mx; i+=2)
        if (collisions({1, 1 + i * (i + 1)}))
        {
            if (collisions({1, 1 + i}))
                return i;
            return i + 1;
        }
    return mx;
}

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