Submission #1239852

#	Time	Username	Problem	Language	Result	Execution time	Memory
1239852		lunarecho	Hack (APIO25_hack)	C++20	0 / 100	0 ms	320 KiB

hack

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

bool is(int l,int r)
{
    long long l2 = l * 1LL, r2 = r * 1LL;
    long long m = sqrt(r2);
    vector<long long> tester;
    for(long long i=l2;i<=l2+m;++i)
    {
        tester.push_back(i);
    }
    for(long long i=r2;i>=l2;i -= m)
    {
        tester.push_back(i);
        if(i - m >= m + l2)
            break;
    }
    return collisions(tester);
}

int hack()
{
    int l = 1;
    int r = 1000000;
    while(l < r)
    {
        int m = (l + r) >> 1;
        if(is(l,m))
        {
            r = m;
        }
        else
        {
            l = m + 1;
        }
    }
    return l;
}

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