oj.uz

Submission #59304

# Submission time Handle Problem Language Result Execution time Memory
59304 2018-07-21T13:03:46 Z thiago4532 Duathlon (APIO18_duathlon) C++17
0 / 100
 228 ms 12904 KB 
#include <bits/stdc++.h>

using namespace std;
const int maxn = 1e5 + 10, inf = 0x3f3f3f3f;
vector<int> grafo[maxn];
int sz[maxn];
int mark[maxn], root[maxn];
bool test[maxn];

void dfs(int u, int p=0){
	if(mark[u]) return;

	sz[u] = 1;
	for(auto v : grafo[u]){
		if(v == p) continue;

		mark[v] = mark[u];	
		dfs(v, u);
		sz[u] += sz[v];
	}
}

int ans;
void solve(int u, int p=0, int acc=0){
	if(test[u]) return;
	test[u] = true;

	ans += (2 * acc * (sz[u] - 1));

	for(auto v : grafo[u]){
		if(v == p) continue;
		ans += (sz[u] - sz[v] - 1) * sz[v];
		solve(v, u, sz[u] - sz[v] + acc);
	}
}

int main(){
	int n, m;
	cin >> n >> m;
	for(int i=1;i<=m;i++){
		int a, b;
		cin >> a >> b;
		grafo[a].push_back(b);
		grafo[b].push_back(a);
	}

	int cnt=0;
	for(int i=1;i<=n;i++)
		if(!mark[i]) mark[i] = ++cnt, root[cnt] = i, dfs(i);

	for(int i=1;i<=cnt;i++)
		solve(root[i]);

	cout << ans << "\n";
	return 0;
}

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 4 ms 2680 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 11.0

# Verdict Execution time Memory Grader output
1 Incorrect 4 ms 2680 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 8.0

# Verdict Execution time Memory Grader output
1 Incorrect 183 ms 12904 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 5 ms 12904 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 13.0

# Verdict Execution time Memory Grader output
1 Incorrect 228 ms 12904 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 15.0

# Verdict Execution time Memory Grader output
1 Incorrect 6 ms 12904 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 158 ms 12904 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #8
0 / 8.0

# Verdict Execution time Memory Grader output
1 Incorrect 4 ms 2680 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #9
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 4 ms 2680 KB Output isn't correct
2 Halted 0 ms 0 KB -