Submission #407350

#	Time	Username	Problem	Language	Result	Execution time	Memory
407350		peuch	The Big Prize (IOI17_prize)	C++17	0 / 100	3072 ms	4924 KiB

prize

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

int find_best(int n) {
	vector<vector<int> > a(n);
	for(int i = 0; i < n; i++){
		if(a[i].empty()) a[i] = ask(i);
		if(a[i][0] == 0 && a[i][1] == 0) return i;
		else if(n - a[i][0] - a[i][1] > 500){
			int ini = i, fim = n - 1;
			while(ini != fim){
				
				int mid = (ini + fim) >> 1;
				if(ini == fim - 1) mid = ini;
				if(a[mid].empty()) a[mid] = ask(mid);
				
				if(a[mid][0] == 0 && a[mid][1] == 0) return i;
				
				if(a[mid][0] + a[mid][1] != a[i][0] + a[i][1]) fim = mid - 1;
				else if(a[mid][0] == a[i][0]) ini = mid;
				else fim = mid - 1;
			}
			i = ini;
		}
	}
	return n - 1;
}

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