Submission #524509

#	Time	Username	Problem	Language	Result	Execution time	Memory
524509		CSQ31	커다란 상품 (IOI17_prize)	C++17	0 / 100	89 ms	200 KiB

prize

#include "prize.h"
#include <bits/stdc++.h>
using namespace std;
int lim = 0;
#define sz(a) (int)(a.size());
int solve(int l,int r){
	if(l > r)return -1;
	int mid = (l+r)/2;
	int i,j;
	for(i=mid+1;i<=r;i++){
		vector<int>res = ask(i);
		if(!res[0] && !res[1])return i;
		else if(!res[1]){
			i = r;
			break;
		}
		else if(res[0] + res[1] > lim)break;
	}
	for(j=mid;j>=l;j--){
		vector<int>res = ask(j);
		if(!res[0] && !res[1])return j;
		else if(!res[0]){
			j = l;
			break;
		}
		else if(res[0] + res[1] > lim)break;
	}
	int c = solve(i+1,r);
	if(c != -1)return c;
	c = solve(l,j-1);
	return c;
}
int find_best(int n) {
	if(n<=0){
		for(int i=0;i<n;i++){
			vector<int>res = ask(i);
			if(!res[0] && !res[1])return i;
		}
	}
	lim = 1;
	for(int i = 2;i<=n;i++){
		int c = i * i + 1;
		if(c + i + 1<=n)lim = i+1;
		else break;
	} //biggest value possible
	return solve(0,n-1);
}

• Subtask 1: 0 / 20
• Subtask 2: 0 / 80