oj.uz

답안 #530930

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
530930 2022-02-27T06:50:40 Z ivls Cijanobakterije (COCI21_cijanobakterije) C++14
15 / 70
 214 ms 10564 KB 
#include <bits/stdc++.h>

using namespace std;

mt19937 rnd(chrono::steady_clock::now().time_since_epoch().count());

using ll = long long;

const int inf = 2e9;

int n, m, mx, nm;
vector<int> g[100100];
bool used[100100];

void dfs(int v, int p, int de)
{
    used[v] = 1;
    if (de > mx) { mx = de; nm = v; }
    for (auto u : g[v])
        if (u != p) dfs(u, v, de + 1);
}

int diam(int v)
{
    mx = 0;
    dfs(v, -1, 0);
    mx = 0;
    dfs(nm, -1, 0);
    return mx + 1;
}

int main()
{
    ios::sync_with_stdio(false); cin.tie(0); cout.tie(0);
    cin >> n >> m;
    for (int i = 1; i <= m; i++)
    {
        int u, v;
        cin >> u >> v;
        g[u].push_back(v);
        g[v].push_back(u);
    }
    int ans = 0;
    for (int i = 1; i <= n; i++)
        if (!used[i]) ans += diam(i);
    cout << ans << '\n';
}

Subtask #1
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 9 ms 3148 KB Output is correct
2 Correct 15 ms 3696 KB Output is correct
3 Correct 23 ms 4268 KB Output is correct
4 Correct 27 ms 4880 KB Output is correct
5 Correct 32 ms 5440 KB Output is correct
6 Correct 40 ms 5896 KB Output is correct

Subtask #2
0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 124 ms 10564 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 2636 KB Output is correct
2 Correct 2 ms 2636 KB Output is correct
3 Correct 2 ms 2636 KB Output is correct
4 Correct 3 ms 2636 KB Output is correct
5 Incorrect 214 ms 3184 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #4
0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 2636 KB Output is correct
2 Incorrect 2 ms 2636 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #5
0 / 28.0

# 결과 실행 시간 메모리 Grader output
1 Correct 9 ms 3148 KB Output is correct
2 Correct 15 ms 3696 KB Output is correct
3 Correct 23 ms 4268 KB Output is correct
4 Correct 27 ms 4880 KB Output is correct
5 Correct 32 ms 5440 KB Output is correct
6 Correct 40 ms 5896 KB Output is correct
7 Incorrect 124 ms 10564 KB Output isn't correct
8 Halted 0 ms 0 KB -