Submission #819216

#	Time	Username	Problem	Language	Result	Execution time	Memory
819216		vjudge1	Werewolf (IOI18_werewolf)	C++17	15 / 100	230 ms	21352 KiB

werewolf

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

using namespace std;

int n, m, q;
const int N = 2e5 + 10;
vector<int> g[N];

vector<int> cnt;
vector<bool> us;
void dfs(int s, int l, int r) {
    us[s] = 1;
    cnt[s]++;
    for(int to : g[s]) {
        if(us[to] || to > r || to < l) continue;
        dfs(to, l, r);
    }
}

vector<int> check_validity(int N, vector<int> X, vector<int> Y,
                                  vector<int> S, vector<int> E,
                                  vector<int> L, vector<int> R) {
    n = N, m = (int)X.size(), q = (int)S.size();
    vector<int> res(q);
    
    for(int i = 0; i < m; i++) {
        g[X[i]].push_back(Y[i]);
        g[Y[i]].push_back(X[i]);
    }

    if(n <= 3000 && q <= 3000) {
        for(int i = 0; i < q; i++) {
            cnt.assign(n, 0);
            us.assign(n, false);
            dfs(S[i], L[i], n - 1);
            us.assign(n, false);
            dfs(E[i], 0, R[i]);
            if(*max_element(cnt.begin(), cnt.end()) > 1)
                res[i] = 1;
        }
    }
    for(int i = 0; i < n; i++) {
        g[i].clear();
    }
    return res;
}

• Subtask 1: 7 / 7
• Subtask 2: 8 / 8
• Subtask 3: 0 / 34
• Subtask 4: 0 / 51