Submission #920658

#	Time	Username	Problem	Language	Result	Execution time	Memory
920658		Macker	Game (IOI14_game)	C++17	42 / 100	1066 ms	13144 KiB

game

#include "game.h"
#include <bits/stdc++.h>
 
using namespace std;
typedef long long ll;
#define all(v) v.begin(), v.end()

vector<set<int>> adj;
set<int> active;
int n;

bool dfs(int a, int f){
    bool ret = 0;
    //if(adj[a].size() < active.size()){
        for (auto &b : adj[a]) {
            if(active.find(b) != active.end()){
                active.erase(b);
                if(b == f) return 1;
                if(dfs(b, f)) return 1;
            }
        }
    /*
    }
    else{
        set<int> tmp = active;
        for (auto &b : tmp) {
            if(adj[a].find(b) != adj[a].end()){
                active.erase(b);
                if(b == f) return 1;
                if(dfs(b, f)) return 1;
            }
        }
    }
    */
    return 0;
}

void initialize(int N) {
    n = N;
    adj.resize(n);
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < n; j++) {
            if(j != i) adj[i].insert(j);
        }
    }
}

int hasEdge(int u, int v) {
    for (int i = 0; i < n; i++) {
        active.insert(i);
    }
    adj[u].erase(v);
    adj[v].erase(u);
    if(dfs(u, v)) return 0;
    else {
        adj[u].insert(v);
        adj[v].insert(u);
        return 1;
    }
}

Compilation message (stderr)

game.cpp: In function 'bool dfs(int, int)':
game.cpp:13:10: warning: unused variable 'ret' [-Wunused-variable]
   13 |     bool ret = 0;
      |          ^~~

• Subtask 1: 15 / 15
• Subtask 2: 27 / 27
• Subtask 3: 0 / 58