Submission #427537

#	Time	Username	Problem	Language	Result	Execution time	Memory
427537		Hazem	The Big Prize (IOI17_prize)	C++14	90 / 100	147 ms	1212 KiB

prize

#include "prize.h"
#include <bits/stdc++.h>
 
using namespace std;

map<int,vector<int>>mp;

int find_best(int n) {
 
	vector<int>cur = ask(0);
	int idx = 0;
	if(!cur[0]&&!cur[1])
		return 0;
 
	while(1){
		
		int l = idx,r = min(n-1,idx+900);
		while(l<r){
			
			int mid = (l+r+1)/2;
			
			vector<int>vec;
			if(mp.find(mid)!=mp.end())
				vec = mp[mid];
			else 
				vec = ask(mid);

			mp[mid] = vec;
			if(vec==cur)l = mid;
			else r = mid-1;
		}
		cur = ask(l+1);
		idx = l+1;
		assert(idx<n);
		if(!cur[0]&&!cur[1])
			return idx;
	}
}

• Subtask 1: 20 / 20
• Subtask 2: 70 / 80