Submission #1137383

#	Time	Username	Problem	Language	Result	Execution time	Memory
1137383		fzyzzz_z	Jail (JOI22_jail)	C++20	Compilation error	0 ms	0 KiB

jail

#include <bits/stdc++.h>
using namespace std; ce

using ll = long long;

void solve() {
  int n; 
  cin >> n; 
  vector<vector<int>> g(n); 
  for (int i = 0; i < n - 1; ++i) {
    int x, y; 
    cin >> x >> y; 
    x--; y--; 
    g[x].push_back(y); 
    g[y].push_back(x); 
  }

  int q; 
  cin >> q; 
  vector<pair<int, int>> ps(q); 
  for (auto & [l, r]: ps) {
    cin >> l >> r; 
    l--; r--; 
  }

  bool ans = 1;

  vector<int> blocked(n, 0), ss(n, 0); 
  function<void(int, int)> make = [&] (int x, int p) {
    ss[x] = 1; 
    for (auto y: g[x]) {
      if (y != p && !blocked[y]) {
        make(y, x); 
        ss[x] += ss[y]; 
      }
    }
  }; 
  function<int(int, int, int)> getc = [&] (int x, int p, int t) {
    for (auto y: g[x]) {
      if (ss[y] > t / 2 && p != y && !blocked[y]) {
        return getc(y, x, t); 
      }
    }
    return x; 
  }; 
  function<void(int, int, vector<int>&)> getcc = [&] (int x, int p, vector<int> & v) {
    v.push_back(x); 
    for (auto y: g[x]) {
      if (y != p && !blocked[y]) {
        getcc(y, x, v); 
      }
    }
  }; 

  function<void(int, vector<pair<int, int>>)> work = [&] (int root, vector<pair<int, int>> p) {
    if (blocked[root] || !p.size()) return;  
    make(root, -1); 
    int c = getc(root, -1, ss[root]); 
    map<int, int> color; 
    map<int, vector<pair<int, int>>> np; 

    int at = 0; 
    vector<int> v; 
    for (auto y: g[c]) {
      if (!blocked[y]) {
        v.clear(); 
        getcc(y, c, v); 
        for (auto x: v) {
          color[x] = at; 
        }
        at++; 
      }
    }

    for (auto [x, y]: p) {
      if (color[x] == color[y]) {
        np[color[x]].push_back({x, y}); 
      }
    }

    
    blocked[c] = 1; 
    for (auto y: g[c]) {
      work(y, np[color[y]]); 
    }
  };
  work(0, ps); 

}
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(0);

  int t;
  cin >> t;
  while (t--) {
    solve(); 
  }

  return 0;
}

Compilation message (stderr)

jail.cpp:2:22: error: 'ce' does not name a type
    2 | using namespace std; ce
      |                      ^~