Submission #542907

#	Time	Username	Problem	Language	Result	Execution time	Memory
542907		Vladth11	Game (IOI14_game)	C++14	100 / 100	417 ms	31596 KiB

game

#include <bits/stdc++.h>
#include "game.h"
#define debug(x) cerr << #x << " " << x << "\n"
#define debugs(x) cerr << #x << " " << x << " "

using namespace std;
typedef long long ll;
typedef pair <int, int> pii;
typedef pair <long double, pii> muchie;

const ll NMAX = 5001;
const ll VMAX = 1000001;
const ll INF = (1LL << 60);
const ll MOD = 1000000007;
const ll BLOCK = 1000000;
const ll base = 13137;
const ll nr_of_bits = 16;

int p[NMAX];
vector <int> comp[NMAX];
int q[NMAX][NMAX];
int N;

void initialize(int n) {
    N = n;
    for(int i = 0; i < N; i++)
    {
        p[i] = i;
        comp[i].push_back(i);
    }
}

int root(int x){
    if(x == p[x])
        return x;
    return p[x] = root(p[x]);
}

int hasEdge(int u, int v) {
    u = root(u);
    v = root(v);
    q[u][v]++;
  	q[v][u]++;
    if(u == v){
        return 0; /// we don't really care
    }
    int ok = (q[u][v]) == (comp[u].size() * comp[v].size());
    if(!ok){
        return 0;
    }
    for(int i = 0; i < N; i++){
        q[v][i] += q[u][i];
    }
    for(int i = 0; i < N; i++){
        q[i][v] += q[i][u];
    }
    for(auto x : comp[u])
        comp[v].push_back(x);
    p[u] = v;
    return 1;
}

Compilation message (stderr)

game.cpp: In function 'int hasEdge(int, int)':
game.cpp:47:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   47 |     int ok = (q[u][v]) == (comp[u].size() * comp[v].size());
      |              ~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 15 / 15
• Subtask 2: 27 / 27
• Subtask 3: 58 / 58