Submission #1251599

#	Time	Username	Problem	Language	Result	Execution time	Memory
1251599		noop	Hack (APIO25_hack)	C++20	64.70 / 100	50 ms	1188 KiB

hack

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

bool query (int l, int r){
    int gap=sqrt(r-l+1);
    vector<long long> v;
    for (int i=1; i<=gap; ++i)
        v.push_back(i);
    for (int i=max(l+1,gap+1); i<=r; i+=gap)
        v.push_back(i);
    v.push_back(r+1);
    return collisions(v);
}

int hack(){
    int l=1,r=1000000000;
    while (l<r && !query((l>>1)+1,l))
        l<<=1;
    r=l<r ? l : r;
    l=(l>>1)+1;
    while (l<r){
        int mid=l+r>>1;
        if (query(l,mid))
            r=mid;
        else
            l=mid+1;
    }
    return l;
}

• Subtask 0: 0 / 0
• Subtask 1: 8 / 8
• Subtask 2: 17 / 17
• Subtask 3: 39.7354 / 75