Submission #1205039

#	Time	Username	Problem	Language	Result	Execution time	Memory
1205039		irmuun	Hack (APIO25_hack)	C++20	62.90 / 100	112 ms	2032 KiB

hack

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

using namespace std;

#define ll long long
#define pb push_back
#define ff first
#define ss second
#define all(s) s.begin(),s.end()
#define rall(s) s.rbegin(),s.rend()

const ll N=1e9,inf=(ll)1e18;

// collisions

int hack(){
	ll lo=2,hi=N;
	while(lo<hi){
		ll mid=(lo+hi)/2;
		ll dif=(mid-lo);
		ll s=sqrtl(dif);
		vector<ll>v;
		v.pb(1);
		for(ll i=1;i<s;i++){
			v.pb(v.back()+s);
		}
		v.pb(v.back()+lo);
		for(ll i=0;i<s;i++){
			v.pb(v.back()+1);
		}
		for(ll i=0;i<dif-s*s;i++){
			v.pb(v.back()+1);
		}
		if(collisions(v)>0){
			hi=mid;
		}
		else{
			lo=mid+1;
		}
	}
	return lo;
}

• Subtask 0: 0 / 0
• Subtask 1: 8 / 8
• Subtask 2: 17 / 17
• Subtask 3: 37.8579 / 75