Submission #795969

#	Time	Username	Problem	Language	Result	Execution time	Memory
795969		NeroZein	Spring cleaning (CEOI20_cleaning)	C++17	0 / 100	48 ms	6692 KiB

cleaning

#include "bits/stdc++.h"
using namespace std;

#ifdef Nero
#include "Deb.h"
#else
#define deb(...)
#endif

const int N = 100005;

vector<int> g[N];

int main(){
  ios::sync_with_stdio(false);
  cin.tie(nullptr);
  int n, q;
  cin >> n >> q;
  for (int i = 1; i < n; ++i) {
    int u, v;
    cin >> u >> v;
    g[u].push_back(v);
    g[v].push_back(u); 
  }
  while (q--) {
    int d;
    cin >> d;
    vector<int> nodes(d);
    for (int i = 0; i < d; ++i) {
      cin >> nodes[i];
    }
    if (d % 2) {
      cout << -1 << '\n'; 
    }
    int ans = n - 1 + d; 
    sort(nodes.begin(), nodes.end()); 
    for (int i = 0; i < d; i += 2) {
      ans += nodes[i + 1] - nodes[i];
    }
    cout << ans << '\n'; 
  }
  return 0;
}

• Subtask 1: 0 / 0
• Subtask 2: 0 / 9
• Subtask 3: 0 / 9
• Subtask 4: 0 / 16
• Subtask 5: 0 / 19
• Subtask 6: 0 / 17
• Subtask 7: 0 / 30