Submission #1048453

#	Time	Username	Problem	Language	Result	Execution time	Memory
1048453		Tob	Magic Show (APIO24_show)	C++17	0 / 100	1 ms	1076 KiB

Alice

#include <bits/stdc++.h>
#include "Alice.h"

#define F first
#define S second
#define all(x) x.begin(), x.end()
#define pb push_back
#define FIO ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0)

using namespace std;

typedef long long ll;
typedef pair <int, int> pii;

const int B = 80, bit = 60, seed = 12345, C = 20;

vector <pii> Alice() {
	int w = B*bit;
	ll x = setN(w+C);
	vector <pii> res;
	
	mt19937 rng(seed);
	
	vector <int> p;
	for (int i = 0; i < w; i++) p.pb(i/B);
	shuffle(all(p), rng);
	
	vector <int> q(w+C);
	for (int i = 0; i < w+C; i++) q[i] = i;
	shuffle(all(q), rng);
	for (int i = 1; i < C; i++) res.pb({q[w+i-1]+1, q[w+i]+1});
	
	mt19937 rng2(x);
	
	auto val = [&](int x) {
		uniform_int_distribution <int> rnd(0, x-1);
		return rnd(rng2);
	};
	
	for (int i = 0; i < w; i++) {
		if (x & (1LL << p[i])) res.pb({q[i]+1, q[i+val(C/2-1)+2]+1});
		else res.pb({q[i]+1, q[i+C/2+val(C/2)+1]+1});
	}
	return res;
}

Bob

#include <bits/stdc++.h>
#include "Bob.h"

#define F first
#define S second
#define all(x) x.begin(), x.end()
#define pb push_back
#define FIO ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0)

using namespace std;

typedef long long ll;
typedef pair <int, int> pii;

const int B = 80, bit = 60, seed = 12345, C = 20;

ll Bob(vector <pii> v) {
	int w = B*bit;
	mt19937 rng(seed);
	
	vector <int> p;
	for (int i = 0; i < w; i++) p.pb(i/B);
	shuffle(all(p), rng);
	
	vector <int> q(w+C), r(w+C);
	for (int i = 0; i < w+C; i++) q[i] = i;
	shuffle(all(q), rng);
	for (int i = 0; i < w+C; i++) r[q[i]] = i;
	
	
	ll res = 0;
	for (auto x : v) {
		if (r[x.S-1] - r[x.F-1] <= C/2 && r[x.F-1] < w) res |= (1LL << p[r[x.F-1]]);
	}
	
	return res;
}

• Subtask 1: 0 / 5
• Subtask 2: 0 / 30
• Subtask 3: 0 / 65