oj.uz

Submission #1084685

# Submission time Handle Problem Language Result Execution time Memory
1084685 2024-09-06T16:51:51 Z SulA Pipes (CEOI15_pipes) C++17
20 / 100
 1381 ms 65536 KB 
#include <bits/stdc++.h>
using namespace std;

vector<int> adj[100000];
vector<bool> multi_edge[100000];
int dep[100000], low[100000];

void dfs(int v, int p, bool multi = false) {
    low[v] = dep[v] = dep[p] + 1;
    for (int j = 0; j < adj[v].size(); j++) {
        int ch = adj[v][j];
        if (ch == p) continue;
        if (dep[ch] == 0) {
            dfs(ch, v, multi_edge[v][j]);
            low[v] = min(low[v], low[ch]);
        } else {
            low[v] = min(low[v], dep[ch]);
        }
    }
    if (low[v] == dep[v] && v != p && !multi) {
        cout << v+1 << " " << p+1 << "\n";
    }
}

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr); cout.tie(nullptr);

    int n,m; cin >> n >> m;
    while (m--) {
        int u,v; cin >> u >> v;
        adj[--u].push_back(--v);
        adj[v].push_back(u);
    }
    for (int i = 0; i < n; i++) {
        sort(adj[i].begin(), adj[i].end());
        multi_edge[i].resize(adj[i].size());
        for (int j = 0; j < adj[i].size(); j++) {
            if (j != 0 && adj[i][j-1] == adj[i][j]) {
                multi_edge[i][j] = true;
            }
            if (j != adj[i].size()-1 && adj[i][j+1] == adj[i][j]) {
                multi_edge[i][j] = true;
            }
        }
    }
    for (int i = 0; i < n; i++) if (dep[i] == 0) dfs(i, i);
}

Compilation message

pipes.cpp: In function 'void dfs(int, int, bool)':
pipes.cpp:10:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   10 |     for (int j = 0; j < adj[v].size(); j++) {
      |                     ~~^~~~~~~~~~~~~~~
pipes.cpp: In function 'int main()':
pipes.cpp:38:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   38 |         for (int j = 0; j < adj[i].size(); j++) {
      |                         ~~^~~~~~~~~~~~~~~
pipes.cpp:42:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   42 |             if (j != adj[i].size()-1 && adj[i][j+1] == adj[i][j]) {
      |                 ~~^~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 6492 KB Output is correct
2 Correct 3 ms 6492 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 7260 KB Output is correct
2 Correct 5 ms 6976 KB Output is correct

Subtask #3
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 113 ms 20228 KB Memory limit exceeded
2 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 198 ms 27796 KB Memory limit exceeded
2 Halted 0 ms 0 KB -

Subtask #5
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 327 ms 44956 KB Memory limit exceeded
2 Halted 0 ms 0 KB -

Subtask #6
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 430 ms 54864 KB Memory limit exceeded
2 Halted 0 ms 0 KB -

Subtask #7
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 781 ms 65536 KB Memory limit exceeded
2 Halted 0 ms 0 KB -

Subtask #8
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 994 ms 65536 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #9
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 1381 ms 65536 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #10
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 1028 ms 65536 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -