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Submission #797328

# Submission time Handle Problem Language Result Execution time Memory
797328 2023-07-29T09:17:50 Z radaiosm7 Duathlon (APIO18_duathlon) C++
23 / 100
 1000 ms 1048576 KB 
#include <bits/stdc++.h>
using namespace std;
#define X first
#define Y second
int n, m, i, a, b;
long long ans, cc;
vector<int> adj[100005];
bool visited[100005];
long long sub[100005];

void dfs1(int x, int p=-1) {
  visited[x] = true;
  sub[x] = 1LL;
  ++cc;

  for (auto y : adj[x]) {
    if (y == p) continue;
    dfs1(y, x);
    sub[x] += sub[y]; 
  }
}

void dfs2(int x, int p=-1) {
  ans += 2LL*(sub[x]-1LL)*(cc-sub[x]);

  for (auto y : adj[x]) {
    if (y == p) continue;
    ans += sub[y]*(sub[x]-1LL-sub[y]);
    dfs2(y, x);
  }
}

int main() {
  scanf("%d%d", &n, &m);

  for (i=0; i < m; ++i) {
    scanf("%d%d", &a, &b);
    adj[a].push_back(b);
    adj[b].push_back(a);
  }

  ans = 0LL;
  fill(visited+1, visited+n+1, false);

  for (i=1; i <= n; ++i) {
    if (!visited[i]) {
      cc = 0LL;
      dfs1(i);
      dfs2(i);
    }
  }

  printf("%lld\n", ans);
  return 0;
}

Compilation message

count_triplets.cpp: In function 'int main()':
count_triplets.cpp:34:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   34 |   scanf("%d%d", &n, &m);
      |   ~~~~~^~~~~~~~~~~~~~~~
count_triplets.cpp:37:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   37 |     scanf("%d%d", &a, &b);
      |     ~~~~~^~~~~~~~~~~~~~~~

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Runtime error 406 ms 1048576 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #2
0 / 11.0

# Verdict Execution time Memory Grader output
1 Runtime error 406 ms 1048576 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #3
0 / 8.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1073 ms 957124 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2644 KB Output is correct
2 Correct 2 ms 2644 KB Output is correct
3 Correct 2 ms 2664 KB Output is correct
4 Correct 2 ms 2644 KB Output is correct
5 Correct 2 ms 2644 KB Output is correct
6 Correct 2 ms 2644 KB Output is correct
7 Correct 2 ms 2644 KB Output is correct
8 Correct 2 ms 2644 KB Output is correct
9 Correct 2 ms 2644 KB Output is correct
10 Correct 2 ms 2644 KB Output is correct
11 Correct 2 ms 2644 KB Output is correct
12 Correct 2 ms 2668 KB Output is correct
13 Correct 2 ms 2656 KB Output is correct
14 Correct 2 ms 2644 KB Output is correct
15 Correct 2 ms 2656 KB Output is correct
16 Correct 1 ms 2644 KB Output is correct
17 Correct 2 ms 2644 KB Output is correct
18 Correct 2 ms 2668 KB Output is correct
19 Correct 2 ms 2668 KB Output is correct
20 Correct 2 ms 2660 KB Output is correct

Subtask #5
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 46 ms 6756 KB Output is correct
2 Correct 33 ms 7884 KB Output is correct
3 Correct 32 ms 7940 KB Output is correct
4 Correct 33 ms 7972 KB Output is correct
5 Correct 33 ms 7884 KB Output is correct
6 Correct 38 ms 12124 KB Output is correct
7 Correct 58 ms 10652 KB Output is correct
8 Correct 38 ms 10012 KB Output is correct
9 Correct 40 ms 9268 KB Output is correct
10 Correct 33 ms 7960 KB Output is correct
11 Correct 37 ms 7900 KB Output is correct
12 Correct 34 ms 7956 KB Output is correct
13 Correct 33 ms 7884 KB Output is correct
14 Correct 31 ms 7780 KB Output is correct
15 Correct 26 ms 7508 KB Output is correct
16 Correct 17 ms 6484 KB Output is correct
17 Correct 30 ms 8276 KB Output is correct
18 Correct 25 ms 8288 KB Output is correct
19 Correct 25 ms 8256 KB Output is correct
20 Correct 26 ms 8208 KB Output is correct

Subtask #6
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2644 KB Output is correct
2 Correct 2 ms 2644 KB Output is correct
3 Runtime error 451 ms 1048576 KB Execution killed with signal 9
4 Halted 0 ms 0 KB -

Subtask #7
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 32 ms 6740 KB Output is correct
2 Correct 33 ms 7948 KB Output is correct
3 Runtime error 564 ms 1048576 KB Execution killed with signal 9
4 Halted 0 ms 0 KB -

Subtask #8
0 / 8.0

# Verdict Execution time Memory Grader output
1 Runtime error 406 ms 1048576 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 406 ms 1048576 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -