제출 #297073

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
297073		Gurban	The Big Prize (IOI17_prize)	C++17	20 / 100	97 ms	1152 KiB

prize

#include <bits/stdc++.h>
#include "prize.h"
#define ff first
#define ss second
using namespace std;

const int maxn = 2e5+5;
int l,r,md,ans,x;
int vis[maxn],mn;

int rand(int a, int b) {
	if(a > b) exit(0);
    return a + rand() % (b - a + 1);
}

int find_best(int n) {
	srand(time(0));
	l = 0,r = n-1;
	while(l <= r){
		md=(l+r)/2;
		vector<int> jog = ask(md);
		if(jog[0] == 0 and jog[1] == 0) return md;
		vis[md]=1;
		if(jog[0] < jog[1]) l = md+1;
		else r = md-1;
	}
	l = 0,r = n-1;
	while(1){
		x = rand(l,r);
		if(vis[x]) continue;
		vector<int> jog = ask(x);
		if(jog[0]+jog[1]==0) return x;
		vis[x]=1;
		if(jog[0] + jog[1] >= mn) continue;
		mn=jog[0] + jog[1];
		if(jog[0] > jog[1]) l=0,r=x-1;
		else l=x+1,r=n-1;
	}
}

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