Submission #289237

#	Time	Username	Problem	Language	Result	Execution time	Memory
289237		JoMee	The Big Prize (IOI17_prize)	C++17	20 / 100	3018 ms	368 KiB

prize

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

using namespace std;
int res = -1;

int c = 0;

int find_best(int n) {
	int current = 0;
	int val = ask(current)[1];

	int rk = val;
	while(true){
		int l = 0;
		int r = n;
		while(r-l > 0){
			int m = (r+l)/2;
			c++;
			if(c == 10000)while(true);
			vector<int> ans = ask(m);
			
			int v = ans[0]+ans[1];
			if(v == 0){
				res = m;
				break;
			}
			if(ans[1] == val && v ==rk){
				l = m;
			}else if(v == rk){
				r = m;
			}
			if(v != rk){
				r = m;
			}
		}
		if(res !=-1)break; 
		if(l == current){
			current++;
			c++;
			if(c == 10000)while(true);
			vector<int> ans = ask(current);
			int v = ans[0]+ans[1];
			if(v == 0){
				res = current;
				break;
			}
			rk = v;
			val = ans[1];
		}else{
			current = l;
			c++;
			if(c == 10000)while(true);
			vector<int> ans = ask(current);
			int v = ans[0]+ans[1];
			if(v == 0){
				res = current;
				break;
			}
			rk = v;
			val = ans[1];
		}



	}


	return res;
}

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