oj.uz

Submission #527269

# Submission time Handle Problem Language Result Execution time Memory
527269 2022-02-17T04:52:40 Z ecxx Pipes (CEOI15_pipes) C++17
10 / 100
 2944 ms 65540 KB 
#include <bits/stdc++.h>
using namespace std;
const int MAXN = 100005;

int* depth = new int[MAXN]{0};
int* low = new int[MAXN]{0};
int* pos = new int[MAXN];
int* edgelist;

void AP(int i, int d, int pa) {
    depth[i] = d; low[i] = d;
    int paedges = 0;
    for (int k = pos[i]; k < pos[i+1]; k++) {
        int ch = edgelist[k];
        //cout << i << " " << ch << " " << pa << " p" << endl;
        if (ch==pa) {
            paedges++;
            continue;
        }
        if (depth[ch] != -1) {
            low[i] = min(low[i], depth[ch]);
        } else {
            AP(ch, d+1, i);
            low[i] = min(low[i], low[ch]);
        }
    }
    //cout << i << " " << pa << " " << paedges << endl;
    if (pa==-1) return;
    if (low[i] > depth[pa] && paedges == 1) {
        cout << i+1 << " " << pa+1 << "\n";
    }
}

int main() {

    int N, M, a, b; cin >> N >> M;
    pair<int,int>* EL;
    EL = new pair<int,int>[2*M];

    for (int i = 0; i < M; i++) {
        cin >> a >> b; a--;b--;
        EL[2*i] = {a,b};
        EL[2*i+1] = {b,a};
    }

    sort(EL, EL+(2*M));

    int curri = -1;
    int q = 0;

    edgelist = new int[2*M+5];

    for (int k=0;k<2*M;k++) {
        auto a = EL[k];
        if (a.first != curri) { 
            pos[a.first] = q;
            curri = a.first;
        }
        edgelist[q] = a.second;
        q++;
    }

    pos[curri+1] = q;

    delete[] EL;

    for (int i = 0; i < N; i++) {
        depth[i] = -1;
    }

    for (int i = 0; i < N; i++) {
        if (depth[i] == -1)  AP(i,0,-1);
    }

}

Subtask #1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 972 KB Wrong number of edges
2 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 9 ms 1440 KB Mismatched edge
2 Halted 0 ms 0 KB -

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 444 ms 15036 KB Output is correct
2 Correct 371 ms 14720 KB Output is correct

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 793 ms 24652 KB Memory limit exceeded
2 Halted 0 ms 0 KB -

Subtask #5
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 1104 ms 36288 KB Memory limit exceeded
2 Halted 0 ms 0 KB -

Subtask #6
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 1372 ms 43920 KB Memory limit exceeded
2 Halted 0 ms 0 KB -

Subtask #7
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 2165 ms 65540 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #8
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 2944 ms 65540 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 33 ms 65540 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 34 ms 65540 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -