Submission #618218

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
618218	2022-08-02 03:23:29	penguinhacker	Power Plant (JOI20_power)	C++17	100 / 100	148 ms	28896 KiB

power

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#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define ar array
const int mxN=2e5;
int n, ans, dp[mxN];
string s;
vector<int> adj[mxN];
void dfs(int u=0, int p=-1) {
  int mx=0;
  dp[u]='0'-s[u];
  for (int v : adj[u])
    if (v!=p) {
      dfs(v, u);
      dp[u]+=max(dp[v], 0);
      mx=max(mx, dp[v]);
    }
  ans=max(ans, mx+(s[u]=='1'));
  if (s[u]=='1')
    dp[u]=max(dp[u], 1);
  ans=max(ans, dp[u]);
}
int main() {
  ios::sync_with_stdio(0);
  cin.tie(0);
  cin >> n;
 
 
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• Subtask 1: 6 / 6
• Subtask 2: 41 / 41
• Subtask 3: 53 / 53