Submission #423486

#	Time	Username	Problem	Language	Result	Execution time	Memory
423486		milleniumEeee	Chameleon's Love (JOI20_chameleon)	C++14	0 / 100	30 ms	328 KiB

chameleon

#ifndef EVAL
#include "grader.cpp"
#endif
#include "chameleon.h"
#include <bits/stdc++.h>
#define fr first
#define sc second
#define pii pair<int, int>
#define pb push_back
#define szof(s) (int)s.size()
#define all(s) s.begin(), s.end()
#define ll long long
using namespace std;

const int MAXN = 505;

// Query(p) | p is vector<int>
// Answer(a, b)

mt19937 rnd(chrono::steady_clock::now().time_since_epoch().count());

int get_rand() {
	ll x = rnd();
	x %= (ll)1e9;
	if (x < 0) {
		x = -x;
	}
	return x;
}

int gen(int l, int r) {
	return l + (get_rand() % (r - l + 1));
}

int n;
bool found[MAXN * 2];

void Solve(int N) {
	n = N;
	for (int i = 1; i <= n * 2; i++) {
		if (found[i]) {
			continue;
		}
		set <int> st;
		while (1) {
			int pos = gen(1, n * 2);
			if (!found[pos] && pos != i && st.find(pos) == st.end()) {
				vector <int> ask = {i, pos};
				st.insert(pos);
				int res = Query(ask);
				if (res == 1) {
					found[i] = found[pos] = 1;
					Answer(i, pos);
					break;
				}
			}
		}
	}
}

• Subtask 1: 0 / 4
• Subtask 2: 0 / 20
• Subtask 3: 0 / 20
• Subtask 4: 0 / 20
• Subtask 5: 0 / 36