oj.uz

Submission #265102

# Submission time Handle Problem Language Result Execution time Memory
265102 2020-08-14T13:09:39 Z extraterrestrial Duathlon (APIO18_duathlon) C++14
23 / 100
 95 ms 14600 KB 
#include <bits/stdc++.h>
typedef long long ll;
typedef long double ld;
using namespace std;
#define F first
#define S second
#define pb push_back  
#define all(x) (x).begin(), (x).end()
#define SZ(x) (int)(x).size()
//#define int ll    

const int N = 1e5 + 10;
vector<int> g[N];
bool used[N];
int sz[N], root[N], pr[N];

void dfs(int v, int rt) {
  used[v] = true;
  sz[v] = 1;
  root[v] = rt;
  for (auto u : g[v]) {
    if (!used[u]) {
      pr[u] = v;
      dfs(u, rt);
      sz[v] += sz[u];
    }
  }
}

signed main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0); 
  cout.tie(0);
  int n, m;
  cin >> n >> m;
  for (int i = 0; i < m; i++) {
    int u, v;
    cin >> u >> v;
    g[u].pb(v);
    g[v].pb(u);
  }
  for (int i = 1; i <= n; i++) {
    if (!used[i]) {
      dfs(i, i);
    }
  }
  ll ans = 0;
  for (int v = 1; v <= n; v++) {
    for (auto u : g[v]) {
      if (u == pr[v]) {
        ans += (sz[root[v]] - sz[v]) * 1ll * (sz[v] - 1);
      }
      else {
        ans += sz[u] * 1ll * (sz[root[v]] - sz[u] - 1);
      }
    }
  }
  cout << ans << '\n';
}

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 2688 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 2688 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 8.0

# Verdict Execution time Memory Grader output
1 Incorrect 87 ms 14600 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 2816 KB Output is correct
2 Correct 2 ms 2688 KB Output is correct
3 Correct 3 ms 2688 KB Output is correct
4 Correct 3 ms 2816 KB Output is correct
5 Correct 2 ms 2816 KB Output is correct
6 Correct 2 ms 2816 KB Output is correct
7 Correct 2 ms 2816 KB Output is correct
8 Correct 2 ms 2816 KB Output is correct
9 Correct 3 ms 2816 KB Output is correct
10 Correct 3 ms 2688 KB Output is correct
11 Correct 2 ms 2816 KB Output is correct
12 Correct 2 ms 2816 KB Output is correct
13 Correct 2 ms 2688 KB Output is correct
14 Correct 2 ms 2688 KB Output is correct
15 Correct 2 ms 2688 KB Output is correct
16 Correct 2 ms 2688 KB Output is correct
17 Correct 2 ms 2756 KB Output is correct
18 Correct 2 ms 2816 KB Output is correct
19 Correct 2 ms 2816 KB Output is correct
20 Correct 2 ms 2816 KB Output is correct

Subtask #5
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 55 ms 8440 KB Output is correct
2 Correct 55 ms 8440 KB Output is correct
3 Correct 58 ms 8488 KB Output is correct
4 Correct 54 ms 8440 KB Output is correct
5 Correct 53 ms 8440 KB Output is correct
6 Correct 66 ms 11768 KB Output is correct
7 Correct 64 ms 10616 KB Output is correct
8 Correct 61 ms 9976 KB Output is correct
9 Correct 60 ms 9464 KB Output is correct
10 Correct 54 ms 8448 KB Output is correct
11 Correct 66 ms 8444 KB Output is correct
12 Correct 56 ms 8440 KB Output is correct
13 Correct 63 ms 8440 KB Output is correct
14 Correct 51 ms 8184 KB Output is correct
15 Correct 51 ms 8056 KB Output is correct
16 Correct 29 ms 6912 KB Output is correct
17 Correct 36 ms 8696 KB Output is correct
18 Correct 37 ms 8816 KB Output is correct
19 Correct 43 ms 8684 KB Output is correct
20 Correct 42 ms 8704 KB Output is correct

Subtask #6
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 2816 KB Output is correct
2 Correct 2 ms 2688 KB Output is correct
3 Incorrect 3 ms 2816 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #7
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 66 ms 8440 KB Output is correct
2 Correct 64 ms 8444 KB Output is correct
3 Incorrect 95 ms 8568 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #8
0 / 8.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 2688 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 2688 KB Output isn't correct
2 Halted 0 ms 0 KB -