제출 #1285729

#제출 시각아이디문제언어결과실행 시간메모리
1285729SmuggingSpunHack (APIO25_hack)C++20
25 / 100
136 ms1320 KiB
#include "hack.h"
#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
const int LIM = 1e9;
int hack(){
	int low = 1, high = LIM - 1, ans = 1;
	while(low <= high){
		int mid = (low + high) >> 1, sqr = sqrt(mid);
		vector<ll>p;
		for(int i = 1; i < sqr; i++){
			p.push_back(i);
		}
		for(int i = 1; sqr * i <= mid; i++){
			p.push_back(sqr * i);
		}
		p.push_back(mid + 1);
		if(collisions(p) == 0){
			low = ans = mid + 1;
		}
		else{
			high = mid - 1;
		}
	}
	return ans;
}
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