oj.uz

Submission #432108

# Submission time Handle Problem Language Result Execution time Memory
432108 2021-06-17T21:06:55 Z SuhaibSawalha1 Duathlon (APIO18_duathlon) C++17
0 / 100
 3 ms 332 KB 
#include <bits/stdc++.h>
using namespace std;

int n, m, nodes, vid, found;
vector<vector<int>> adj;
vector<int> vis;
long long ans;

void dfs (int u, int t, int k, bool ok = 0) {
  if (found) {
    return;
  }
  vis[u] = vid;
  if (u == k) {
    found = ok;
    ans += ok;
  }
  ok |= u == t;
  for (int v : adj[u]) {
    if (vis[v] != vid) {
      dfs(v, t, k, ok);
    }
  }
  vis[u] = 0;
}
    
int main (){

  #ifndef ONLINE_JUDGE
    freopen("SuhaibSawalha1","r",stdin);
  #endif

  ios_base::sync_with_stdio(false);
  cin.tie(NULL);

  cin >> n >> m;
  adj.resize(n);
  while (m--) {
    int u, v;
    cin >> u >> v, --u, --v;
    adj[u].push_back(v);
    adj[v].push_back(u);
  }    
  vis.resize(n);
  for (int u = 0; u < n; ++u) {
    for (int v = 0; v < n; ++v) {
      for (int k = 0; k < n; ++k) {
        if (set<int>{u, v, k}.size() == 3) {
          ++vid;
          found = 0;
          dfs(u, v, k);
        }
      }
    }
  }
  cout << ans;

  return 0;
}

Compilation message

count_triplets.cpp: In function 'int main()':
count_triplets.cpp:30:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   30 |     freopen("SuhaibSawalha1","r",stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 332 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 11.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 332 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 8.0

# Verdict Execution time Memory Grader output
1 Incorrect 3 ms 332 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 3 ms 332 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 13.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 332 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 15.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 332 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 332 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #8
0 / 8.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 332 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #9
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 332 KB Output isn't correct
2 Halted 0 ms 0 KB -