Submission #122659

#	Time	Username	Problem	Language	Result	Execution time	Memory
122659		SirCeness	The Big Prize (IOI17_prize)	C++14	0 / 100	5 ms	2108 KiB

prize

#include <bits/stdc++.h>

#define pb push_back
#define mp make_pair
#include "prize.h"
using namespace std;
typedef long long ll;

int arr[200005];
int n;
int tmp[200005];
// 22

int find_best(int size){
	n = size;
	for (int i = 0; i < size; i++) arr[i] = i;
	int maxx = 0;
	
	for (int i = 0; i < min(10, n); i++){
		vector<int> ans = ask(i);
		maxx = max(ans[0] + ans[1], maxx);
	}
	
	int tmpsize = 0;
	for (int i = 0; i < maxx; i++){
		int l = 0;
		int r = n-1;
		while (l < r){
			int m = (l+r+1)/2;
			vector<int> ans = ask(arr[m]);
			if (ans[0] > i) r = m-1;
			else l = m;
		}
		tmp[tmpsize++] = arr[l+1];
	}
	
	for (int i = 0; i < tmpsize; i++){
		arr[i] = tmp[i];
	}
	n = tmpsize;
	
	maxx = 0;
	
	for (int i = 0; i < min(10, n); i++){
		vector<int> ans = ask(i);
		maxx = max(ans[0] + ans[1], maxx);
	}
	
	tmpsize = 0;
	for (int i = 0; i < maxx; i++){
		int l = 0;
		int r = n-1;
		while (l < r){
			int m = (l+r+1)/2;
			vector<int> ans = ask(arr[m]);
			if (ans[0] > i) r = m-1;
			else l = m;
		}
		tmp[tmpsize++] = arr[l+1];
	}
	
	for (int i = 0; i < n; i++){
		vector<int> ans = ask(arr[i]);
		if (ans[0] == 0 && ans[1] == 0){
			return arr[i];
		}
	}
	
	assert(0);
}

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