Submission #503777

#	Time	Username	Problem	Language	Result	Execution time	Memory
503777		Abrar_Al_Samit	Power Plant (JOI20_power)	C++17	6 / 100	1567 ms	5068 KiB

power

#include<bits/stdc++.h>
using namespace std;
const int MX = 200005;
vector<int>g[MX];
int n;
int dp[MX];
string s;
int ans;
int solve(int v, int p=-1) {
  int &ret = dp[v];
  ret = 0;
  if(s[v]=='0') {
    for(auto u : g[v]) if(u!=p) {
      ret += solve(u, v);
    }
  } else {
    int mx = 0, sum = 0;
    for(auto u : g[v]) if(u!=p) {
      mx = max(mx, solve(u, v));
      sum += solve(u, v);
    }
    mx += 1;
    sum -= 1;
    ans = max({mx, ans, sum});
    ret = max(1, sum);
  }
  return ret;
}
void PlayGround() {
  cin >> n;
  for(int i=1; i<n; ++i) {
    int u, v; cin >> u >> v;
    g[u].push_back(v);
    g[v].push_back(u);
  }
  cin >> s;
  s = "#" + s;
  cout << max(ans, solve(1)) << endl;
}
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  PlayGround();
  return 0;
}

• Subtask 1: 6 / 6
• Subtask 2: 0 / 41
• Subtask 3: 0 / 53