Submission #1072379

#	Time	Username	Problem	Language	Result	Execution time	Memory
1072379		Joshua_Andersson	The Big Prize (IOI17_prize)	C++14	20 / 100	76 ms	2132 KiB

prize

#include "prize.h"

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

typedef long long ll;
const ll linf = ll(1e18);

typedef vector<int> vi;
typedef vector<vi> vvi;
typedef pair<int, int> p2;

#define rep(i, high) for (int i = 0; i < high; i++)
#define repp(i, low, high) for (int i = low; i < high; i++)
#define repe(i, container) for (auto& i : container)
#define sz(container) ((int)container.size())
#define all(x) begin(x),end(x)

#if _LOCAL
#define assert(x) if (!(x)) __debugbreak()
#endif

int find_best(int n) {
	int a = 9000;
	int b = 4000;
	vector<p2> density(n);
	rep(i, n) density[i].second = i;

	uniform_int_distribution<int> dist(1, n - 2);
	mt19937 rng(10);
	rep(i, a)
	{
		int p = dist(rng);

		vi res = ask(p);
		//rep(i, p) density[i].first += res[0];
		//repp(i, p+1,n) density[i].first += res[1];
		density[0].first += res[0];
		density[p].first -= res[0];
		density[p + 1].first += res[1];
	}
	repp(i, 1, n) density[i].first += density[i - 1].first;
	sort(density.rbegin(), density.rend());

	repe(u, density)
	{
		vi res = ask(u.second);
		if (res[0]==0&&res[1]==0)
		{
			return u.second;
		}
	}

	return 0;
}

Compilation message (stderr)

prize.cpp: In function 'int find_best(int)':
prize.cpp:25:6: warning: unused variable 'b' [-Wunused-variable]
   25 |  int b = 4000;
      |      ^

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