Submission #8842701


Source Code Expand

#include<bits/stdc++.h>
using namespace std;

int main(){
  int n;
  int m;
  cin >> n;
  cin >> m;
  vector<int> a(m);
  vector<int> b(m);
  for(int i = 0;i<m;i++){
    cin >> a.at(i) >> b.at(i);
  }
  
  int result = 0;
  queue<int> que;
  vector<int> grouping(n);
  for(int k=0;k<m;k++){
    int groupcnt = 0;
    que.empty();
    for(int i=0;i<n;i++){
      grouping.at(i) = -1;
    }
    
    for(int i = 0;i<n;i++){
      if(grouping.at(i) == -1){
        que.push(i);
        grouping.at(i) = groupcnt;
        while(!que.empty()){ //1
          int target = que.front();
          que.pop();
          for(int j=0;j<m;j++){ //2
            if(a.at(j)-1 == target && j != k){ //3
              if(grouping.at(b.at(j)-1) == -1){ //4
                que.push(b.at(j)-1);
                grouping.at(b.at(j)-1) = groupcnt;
              } //4
            }else if(b.at(j)-1 == target && j != k){ //3
              if(grouping.at(a.at(j)-1) == -1){ //4
                que.push(a.at(j)-1);
                grouping.at(a.at(j)-1) = groupcnt;
              } // 4
            } //3
          } //2
        } //1
        groupcnt++;
        //cout << "###" << endl;
      }  
      
    }
    if(groupcnt != 1){
      result++;
    }
  }
  cout << result << endl;
}
  
        
          
                   
    
  

Submission Info

Submission Time
Task C - Bridge
User taropro
Language C++14 (GCC 5.4.1)
Score 300
Code Size 1377 Byte
Status AC
Exec Time 2 ms
Memory 256 KB

Judge Result

Set Name Sample All
Score / Max Score 0 / 0 300 / 300
Status
AC × 3
AC × 20
Set Name Test Cases
Sample sample_01.txt, sample_02.txt, sample_03.txt
All sample_01.txt, sample_02.txt, sample_03.txt, subtask_1_1.txt, subtask_1_10.txt, subtask_1_11.txt, subtask_1_12.txt, subtask_1_13.txt, subtask_1_14.txt, subtask_1_15.txt, subtask_1_16.txt, subtask_1_17.txt, subtask_1_2.txt, subtask_1_3.txt, subtask_1_4.txt, subtask_1_5.txt, subtask_1_6.txt, subtask_1_7.txt, subtask_1_8.txt, subtask_1_9.txt
Case Name Status Exec Time Memory
sample_01.txt AC 1 ms 256 KB
sample_02.txt AC 1 ms 256 KB
sample_03.txt AC 1 ms 256 KB
subtask_1_1.txt AC 2 ms 256 KB
subtask_1_10.txt AC 1 ms 256 KB
subtask_1_11.txt AC 1 ms 256 KB
subtask_1_12.txt AC 1 ms 256 KB
subtask_1_13.txt AC 2 ms 256 KB
subtask_1_14.txt AC 2 ms 256 KB
subtask_1_15.txt AC 2 ms 256 KB
subtask_1_16.txt AC 2 ms 256 KB
subtask_1_17.txt AC 2 ms 256 KB
subtask_1_2.txt AC 2 ms 256 KB
subtask_1_3.txt AC 1 ms 256 KB
subtask_1_4.txt AC 1 ms 256 KB
subtask_1_5.txt AC 1 ms 256 KB
subtask_1_6.txt AC 1 ms 256 KB
subtask_1_7.txt AC 1 ms 256 KB
subtask_1_8.txt AC 1 ms 256 KB
subtask_1_9.txt AC 1 ms 256 KB