#include<bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
typedef long long ll;
using namespace std;
using namespace __gnu_pbds;
#define ordered_set tree<x, null_type,
ll mod=(ll)1e9+7;
ll mod1=998244353;
///the defines :)
#define endl '\n'
#define vi vector<int>
#define ent(arr) for(int i=0;i<arr.size();i++)cin>>arr[i];
#define all(arr) arr.begin(),arr.end()
#define allr(arr) arr.rbegin(),arr.rend()
#define sz size()
#define int long long
vector<vector<int>>adj;
string s;
int n;
int dp[200001];
int ans1=0;
int ans(int node,int p)
{
//cout<<node<<" "<<p<<endl;
int e=0,e1=0;
for(auto i:adj[node])
{//
//cout<<i<<endl;
if(i==p)continue;
int x=ans(i,node);
e1+=x;
}
if(s[node-1]=='1')e1=max(e1-1,1ll);
return dp[node]=e1;
}
void preprocess() {}
void solve()
{
cin>>n;
adj.resize(n+1);
for(int i=0;i<n-1;i++)
{
int a,b;
cin>>a>>b;
adj[a].push_back(b);
adj[b].push_back(a);
}
cin>>s;
ans(1,0);
int x=0;
for(int i=1;i<=n;i++)
if(s[i-1]=='1')x=max(x,dp[i]+1);
cout<<x<<endl;
}
signed main()
{
// freopen("meta_game_input.txt","r",stdin);
// freopen("otput.txt","w",stdout);
ios_base::sync_with_stdio(false);
cin.tie(NULL);
preprocess();
int t=1,st;
//cin>>t;
while(t--)
solve();
}
Compilation message
power.cpp: In function 'long long int ans(long long int, long long int)':
power.cpp:26:9: warning: unused variable 'e' [-Wunused-variable]
26 | int e=0,e1=0;
| ^
power.cpp: In function 'int main()':
power.cpp:63:13: warning: unused variable 'st' [-Wunused-variable]
63 | int t=1,st;
| ^~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
0 ms |
348 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
0 ms |
348 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
0 ms |
348 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
