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Submission #117735

# Submission time Handle Problem Language Result Execution time Memory
117735 2019-06-17T07:15:57 Z minhtung0404 Pipes (CEOI15_pipes) C++17
0 / 100
 3846 ms 62568 KB 
//https://oj.uz/problem/view/CEOI15_pipes

#include<bits/stdc++.h>
const int N = 1e5 + 5;
using namespace std;

typedef pair <int, int> ii;
vector <ii> G[N];
int n, m, low[N], num[N], cnt;

struct dsu{
    int pset[N];

    void init(){
        for (int i = 1; i <= n; i++) pset[i] = i;
    }

    int find(int i) {return ((pset[i] == i) ? i : pset[i] = find(pset[i]));}

    bool Union(int i, int j, int id){
        int u = find(i), v = find(j);
        if (u == v) return false;
        pset[u] = v;
        G[i].push_back(ii(j, id));
        G[j].push_back(ii(i, id));
        return true;
    }
} a[2];

void dfs(int u, int p, int id){
    num[u] = low[u] = ++cnt;
    for (auto pr : G[u]){
        int v = pr.first, x = pr.second;
        if (x == id) continue;
        if (num[v]){
            low[u] = min(low[u], num[v]);
        }
        else{
            dfs(v, u, x);
            low[u] = min(low[u], low[v]);
        }
    }
    if (u != p && low[u] >= num[u]) cout << u << " " << p << "\n";
}

int main(){
    cin >> n >> m;
    a[0].init(); a[1].init();
    for (int i = 1; i <= m; i++){
        int u, v; cin >> u >> v;
        if (!a[0].Union(u, v, i)) a[1].Union(u, v, i);
    }
//    for (int i = 1; i <= n; i++) if (!num[i]) dfs(i, i, 0);
}

Subtask #1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 9 ms 2688 KB Wrong number of edges
2 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 11 ms 3072 KB Wrong number of edges
2 Halted 0 ms 0 KB -

Subtask #3
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 282 ms 6836 KB Output is correct
2 Incorrect 278 ms 6856 KB Wrong number of edges

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 497 ms 7032 KB Output is correct
2 Incorrect 632 ms 14884 KB Wrong number of edges

Subtask #5
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 930 ms 7956 KB Output is correct
2 Runtime error 743 ms 18296 KB Memory limit exceeded (if you are sure your verdict is not MLE, please contact us)

Subtask #6
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1199 ms 9332 KB Output is correct
2 Runtime error 1064 ms 25720 KB Memory limit exceeded (if you are sure your verdict is not MLE, please contact us)

Subtask #7
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1861 ms 12236 KB Output is correct
2 Incorrect 1786 ms 10476 KB Wrong number of edges

Subtask #8
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2880 ms 14620 KB Output is correct
2 Incorrect 2370 ms 14840 KB Wrong number of edges

Subtask #9
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 3058 ms 14552 KB Output is correct
2 Runtime error 3050 ms 62568 KB Memory limit exceeded (if you are sure your verdict is not MLE, please contact us)

Subtask #10
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 3846 ms 10976 KB Output is correct
2 Runtime error 3600 ms 22880 KB Memory limit exceeded (if you are sure your verdict is not MLE, please contact us)