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Submission #927758

# Submission time Handle Problem Language Result Execution time Memory
927758 2024-02-15T09:58:55 Z TAhmed33 Duathlon (APIO18_duathlon) C++
0 / 100
 871 ms 1048576 KB 
#include <bits/stdc++.h>
using namespace std;
#define int long long
int n;
vector <int> adj[300001];
int sze[300001];
bool vis[300001];
void calc (int pos, int par) {
  	vis[pos] = 1;
	for (auto j : adj[pos]) {
		if (j == par) continue;
		calc(j, pos);
		sze[pos] += sze[j];
	}
	sze[pos]++;
}
int dfs (int pos, int par, int cnt = 0) {
  	vis[pos] = 1;
	int sum = (sze[pos] - 1) * cnt;
	int sum2 = sze[pos] - 1;
	for (auto j : adj[pos]) {
		if (j == par) continue;
		sum += dfs(j, pos, cnt + sze[pos] - sze[j]);
		sum2 -= sze[j];
		sum += sze[j] * (sum2);
	}
	return sum;
}
signed main () {
    cin >> n; int m; cin >> m;
    for (int i = 1; i < n; i++) {
	    int a, b;
	    cin >> a >> b;
	    adj[a].push_back(b);
	    adj[b].push_back(a);
    }
    for (int i = 1; i <= n; i++) if (!vis[i]) calc(i, -1);
    memset(vis, 0, sizeof(vis));
  	int ans = 0;
  	for (int i = 1; i <= n; i++) if (!vis[i]) ans += dfs(i, -1);
  	cout << 2 * ans << '\n';
}

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Runtime error 617 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 617 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 Incorrect 65 ms 19356 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 10076 KB Output is correct
2 Correct 2 ms 10076 KB Output is correct
3 Correct 3 ms 10076 KB Output is correct
4 Correct 4 ms 10076 KB Output is correct
5 Correct 3 ms 9984 KB Output is correct
6 Correct 3 ms 10076 KB Output is correct
7 Correct 4 ms 10180 KB Output is correct
8 Correct 3 ms 10076 KB Output is correct
9 Correct 3 ms 10172 KB Output is correct
10 Incorrect 3 ms 10328 KB Output isn't correct
11 Halted 0 ms 0 KB -

Subtask #5
0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 66 ms 15088 KB Output is correct
2 Correct 69 ms 14932 KB Output is correct
3 Correct 66 ms 14992 KB Output is correct
4 Correct 61 ms 14920 KB Output is correct
5 Correct 57 ms 15036 KB Output is correct
6 Correct 64 ms 18740 KB Output is correct
7 Correct 61 ms 17748 KB Output is correct
8 Correct 61 ms 16984 KB Output is correct
9 Correct 66 ms 16396 KB Output is correct
10 Incorrect 60 ms 14932 KB Output isn't correct
11 Halted 0 ms 0 KB -

Subtask #6
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 10072 KB Output is correct
2 Correct 4 ms 10076 KB Output is correct
3 Runtime error 552 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 70 ms 13632 KB Output is correct
2 Correct 79 ms 14968 KB Output is correct
3 Runtime error 871 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 617 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 617 ms 1048576 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -