oj.uz

Submission #876823

# Submission time Handle Problem Language Result Execution time Memory
876823 2023-11-22T11:56:48 Z overwatch9 Sjekira (COCI20_sjekira) C++17
0 / 110
 0 ms 348 KB 
//subtask3
#include <iostream>
#include <vector>
#include <set>
using namespace std;
using ll = long long;
vector <bool> blocked;
vector <vector <int>> adj;
vector <int> col;
int dfs(int s, int p) {
    int ans = col[s];
    for (auto i : adj[s]) {
        if (!blocked[i] && i != p)
            ans = max(ans, dfs(i, s));
    }
    return ans;
}
int main() {
    freopen("in.txt", "r", stdin);
    int n;
    cin >> n;
    adj.resize(n+1);
    col.resize(n+1);
    multiset <pair <int, int>> s;
    for (int i = 1; i <= n; i++) {
        int t;
        cin >> t;
        col[i] = t;
        s.insert({t, i});
    }
    for (int i = 0; i < n-1; i++) {
        int a, b;
        cin >> a >> b;
        adj[a].push_back(b);
        adj[b].push_back(a);
    }
    blocked.resize(n+1);
    ll ans = 0;
    while (!s.empty()) {
        ll mx = s.rbegin()->first, pos = s.rbegin()->second;
        s.erase(--s.end());
        ll added = 0;
        for (auto i : adj[pos]) {
            if (!blocked[i]) {
                added++;
                ans += dfs(i, pos);
            }
        }
        blocked[pos] = true;
        ans += mx * added;
    }
    cout << ans << '\n';
}

Compilation message

sjekira.cpp: In function 'int main()':
sjekira.cpp:19:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   19 |     freopen("in.txt", "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~

Subtask #1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 344 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 348 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 30.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 344 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 60.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 344 KB Output isn't correct
2 Halted 0 ms 0 KB -