Submission #790759

#	Time	Username	Problem	Language	Result	Execution time	Memory
790759		fatemetmhr	The Big Prize (IOI17_prize)	C++17	20 / 100	46 ms	2204 KiB

prize

//  ~ Be Name Khoda ~  //

#include "prize.h"
#include <bits/stdc++.h>
//#pragma GCC optimize ("O3")
//#pragma GCC target("avx2")
//#pragma GCC optimize("unroll-loops,Ofast")

using namespace std;

typedef long long ll;

#define pb       push_back
#define mp       make_pair
#define all(x)   x.begin(), x.end()
#define fi       first
#define se       second

const int maxn  =  1e6   + 10;
const int maxn5 =  5e5   + 10;
const int maxnt =  1.2e6 + 10;
const int maxn3 =  1e3   + 10;
const int mod   =  1e9   + 7;
const ll  inf   =  1e18;


pair <int, int> ans[maxn5];
vector <int> av;
bool done[maxn5], mark[maxn5];
int cnt = 0;


pair <int, int> assk(int id){
	if(!done[id]){
		cnt++;
		vector <int> x = ask(id);
		done[id] = true;
		ans[id].fi = x[0];
		ans[id].se = x[1];
	}
	auto ret = ans[id];
	for(auto u : av){
		if(u < id && ans[u].fi + ans[u].se < ans[id].fi + ans[id].se)
			ret.fi--;
		if(u > id && ans[u].fi + ans[u].se < ans[id].fi + ans[id].se)
			ret.se--;
	}
	return ret;
}

int find_best(int n) {
	while(av.size() < 500){
		int l = 0, r = n; // [l, r)
		while(r - l > 1){
			int mid = (l + r) >> 1;
			pair <int, int> ans = assk(mid);
			if(ans.fi == 0 && ans.se == 0)
				return mid;
			assert(ans.fi >= 0 && ans.se >= 0);
			if(ans.fi)
				r = mid;
			else
				l = mid;
		}
		av.pb(l);
		//assert(!mark[l]);
		mark[l] = true;
		auto ans = assk(l);
		if(ans.fi == -1)
			return 0;
		if(ans.fi == 0 && ans.se == 0)
			return l;
	}
	return 0;
}

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