Submission #122818

#	Time	Username	Problem	Language	Result	Execution time	Memory
122818		SirCeness	The Big Prize (IOI17_prize)	C++14	20 / 100	103 ms	2704 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;
pair<int, int> anslar[200005];
int maxx;
int soncevap = -1;
// 22
 
vector<int> get(int k){
	//cout << "get(" << k << ")" << endl;
	vector<int> ans(2);
	if (anslar[k].first == -1){
		ans = ask(k);
		anslar[k] = mp(ans[0], ans[1]);
		if (ans[0] + ans[1] == 0){
			soncevap = k;
			//cout << "cevabim: " << k << endl;
			//cout << ans[0] << " - " << ans[1] << endl;
		}
	}
	ans[0] = anslar[k].first;
	ans[1] = anslar[k].second;
	//cout << "return " << ans[0] << ", " << ans[1] << endl;
	return ans;
}
 
 
int find_best(int size){
	n = size;
	for (int i = 0; i < size; i++) arr[i] = i;
	for (int i = 0; i < 200005; i++) anslar[i] = mp(-1, -1);
	
	maxx = 1;
	for (int i = 0; i <= maxx+1; i++){
		vector<int> ans = get(i);
		//if(soncevap != -1) return soncevap;
		maxx = max(ans[0] + ans[1], maxx);
		if (maxx >= sqrt(sqrt(n))) break;
	}
	
	//cout << "maxx: " << maxx << endl;
	
	for (int i = 0; i < maxx; i++){
		//cout << "i: " << i << endl;
		int l = 0;
		int r = n-1;
		while (l < r){
			int m = (l+r+1)/2;
			vector<int> ans = get(m);
			//if(soncevap != -1) return soncevap;
			while (ans[0] + ans[1] != maxx && l < m){
				m--;
				ans = get(m);
				//if(soncevap != -1) return soncevap;
			}
			if (l == m) break;
			if (ans[0] > i) r = m-1;
			else l = m;
		}
		//cout << "find: " << l << endl;
		vector<int> ans = get(l);
		//if(soncevap != -1) return soncevap;
		if (ans[0] + ans[1] == maxx) l++;
		if (l >= n) continue;
		while (anslar[l].first != -1 && l < n){
			if (anslar[l].first + anslar[l].second == maxx) break;
			l++;
		}
		if (l >= n) continue;
		ans = get(l);
		//if(soncevap != -1) return soncevap;
		
	}
	
	//cout << "size: " << vec.size() << endl;
	assert(soncevap != -1);
	return soncevap;
}

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