//by szh
#include<bits/stdc++.h>
using namespace std;
#define fi first
#define se second
#define pii pair<int,int>
#define pll pair<long long,long long>
#define pb push_back
#define debug(x) cerr<<#x<<"="<<x<<endl
#define pq priority_queue
#define inf 0x3f
#define rep(i,a,b) for (int i=a;i<(b);i++)
#define MP make_pair
#define SZ(x) (int(x.size()))
#define ll long long
#define mod 1000000007
#define ALL(x) x.begin(),x.end()
void inc(int &a,int b) {a=(a+b)%mod;}
void dec(int &a,int b) {a=(a-b+mod)%mod;}
int lowbit(int x) {return x&(-x);}
ll p0w(ll base,ll p) {ll ret=1;while(p>0){if (p%2ll==1ll) ret=ret*base%mod;base=base*base%mod;p/=2ll;}return ret;}
const int maxn = 2e5+10;
int n;
vector <int> edge[maxn];
bool mark[maxn];
int dp[maxn][2];
void dfs(int u,int fa) {
int sum = 0,mx1 = -maxn,mx0 = -maxn;
for (int v:edge[u]) {
if (v==fa) continue;
dfs(v,u);
sum += dp[v][0];
mx1 = max(mx1,dp[v][1]);
mx0 = max(mx0,dp[v][0]);
}
if (mark[u]) {
dp[u][0] = max(sum-1,1);
dp[u][1] = max(mx1,mx0+1);
dp[u][1] = max(dp[u][1],sum-1);
}
else {
dp[u][0] = sum;
dp[u][1] = mx1;
}
}
int main() {
// freopen("input.txt","r",stdin);
std::ios::sync_with_stdio(false);cin.tie(0);
cin>>n;
rep(i,1,n) {
int u,v;cin>>u>>v;
edge[u].pb(v);
edge[v].pb(u);
}
string s;cin>>s;
rep(i,0,n) if (s[i]=='1') mark[i+1]=1;
dfs(1,-1);
cout<<max(dp[1][0],dp[1][1]);
return 0;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 2 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 3 |
Correct |
3 ms |
5028 KB |
Output is correct |
| 4 |
Correct |
3 ms |
5024 KB |
Output is correct |
| 5 |
Correct |
3 ms |
5036 KB |
Output is correct |
| 6 |
Correct |
4 ms |
5036 KB |
Output is correct |
| 7 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 8 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 9 |
Correct |
3 ms |
5032 KB |
Output is correct |
| 10 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 11 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 12 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 13 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 14 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 15 |
Correct |
6 ms |
4948 KB |
Output is correct |
| 16 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 17 |
Correct |
5 ms |
4948 KB |
Output is correct |
| 18 |
Correct |
4 ms |
5032 KB |
Output is correct |
| 19 |
Correct |
8 ms |
5024 KB |
Output is correct |
| 20 |
Correct |
3 ms |
5032 KB |
Output is correct |
| 21 |
Correct |
3 ms |
4948 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 2 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 3 |
Correct |
3 ms |
5028 KB |
Output is correct |
| 4 |
Correct |
3 ms |
5024 KB |
Output is correct |
| 5 |
Correct |
3 ms |
5036 KB |
Output is correct |
| 6 |
Correct |
4 ms |
5036 KB |
Output is correct |
| 7 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 8 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 9 |
Correct |
3 ms |
5032 KB |
Output is correct |
| 10 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 11 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 12 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 13 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 14 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 15 |
Correct |
6 ms |
4948 KB |
Output is correct |
| 16 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 17 |
Correct |
5 ms |
4948 KB |
Output is correct |
| 18 |
Correct |
4 ms |
5032 KB |
Output is correct |
| 19 |
Correct |
8 ms |
5024 KB |
Output is correct |
| 20 |
Correct |
3 ms |
5032 KB |
Output is correct |
| 21 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 22 |
Correct |
4 ms |
5048 KB |
Output is correct |
| 23 |
Correct |
4 ms |
5076 KB |
Output is correct |
| 24 |
Correct |
3 ms |
5076 KB |
Output is correct |
| 25 |
Correct |
3 ms |
5036 KB |
Output is correct |
| 26 |
Correct |
6 ms |
5076 KB |
Output is correct |
| 27 |
Correct |
3 ms |
5076 KB |
Output is correct |
| 28 |
Correct |
4 ms |
5044 KB |
Output is correct |
| 29 |
Correct |
4 ms |
5172 KB |
Output is correct |
| 30 |
Correct |
4 ms |
5224 KB |
Output is correct |
| 31 |
Correct |
4 ms |
5076 KB |
Output is correct |
| 32 |
Correct |
3 ms |
5076 KB |
Output is correct |
| 33 |
Correct |
3 ms |
5076 KB |
Output is correct |
| 34 |
Correct |
4 ms |
5092 KB |
Output is correct |
| 35 |
Correct |
4 ms |
5076 KB |
Output is correct |
| 36 |
Correct |
3 ms |
5076 KB |
Output is correct |
| 37 |
Correct |
4 ms |
5048 KB |
Output is correct |
| 38 |
Correct |
3 ms |
5020 KB |
Output is correct |
| 39 |
Correct |
4 ms |
5076 KB |
Output is correct |
| 40 |
Correct |
4 ms |
5164 KB |
Output is correct |
| 41 |
Correct |
3 ms |
5204 KB |
Output is correct |
| 42 |
Correct |
5 ms |
5076 KB |
Output is correct |
| 43 |
Correct |
3 ms |
5132 KB |
Output is correct |
| 44 |
Correct |
4 ms |
5092 KB |
Output is correct |
| 45 |
Correct |
3 ms |
5076 KB |
Output is correct |
| 46 |
Correct |
4 ms |
5076 KB |
Output is correct |
| 47 |
Correct |
4 ms |
5052 KB |
Output is correct |
| 48 |
Correct |
4 ms |
5176 KB |
Output is correct |
| 49 |
Correct |
3 ms |
5204 KB |
Output is correct |
| 50 |
Correct |
3 ms |
5076 KB |
Output is correct |
| 51 |
Correct |
3 ms |
5076 KB |
Output is correct |
| 52 |
Correct |
4 ms |
5076 KB |
Output is correct |
| 53 |
Correct |
3 ms |
5172 KB |
Output is correct |
| 54 |
Correct |
3 ms |
5092 KB |
Output is correct |
| 55 |
Correct |
4 ms |
5040 KB |
Output is correct |
| 56 |
Correct |
4 ms |
5076 KB |
Output is correct |
| 57 |
Correct |
4 ms |
5204 KB |
Output is correct |
| 58 |
Correct |
3 ms |
5076 KB |
Output is correct |
| 59 |
Correct |
4 ms |
5048 KB |
Output is correct |
| 60 |
Correct |
5 ms |
5204 KB |
Output is correct |
| 61 |
Correct |
3 ms |
5148 KB |
Output is correct |
| 62 |
Correct |
4 ms |
5204 KB |
Output is correct |
| 63 |
Correct |
3 ms |
5076 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 2 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 3 |
Correct |
3 ms |
5028 KB |
Output is correct |
| 4 |
Correct |
3 ms |
5024 KB |
Output is correct |
| 5 |
Correct |
3 ms |
5036 KB |
Output is correct |
| 6 |
Correct |
4 ms |
5036 KB |
Output is correct |
| 7 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 8 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 9 |
Correct |
3 ms |
5032 KB |
Output is correct |
| 10 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 11 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 12 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 13 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 14 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 15 |
Correct |
6 ms |
4948 KB |
Output is correct |
| 16 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 17 |
Correct |
5 ms |
4948 KB |
Output is correct |
| 18 |
Correct |
4 ms |
5032 KB |
Output is correct |
| 19 |
Correct |
8 ms |
5024 KB |
Output is correct |
| 20 |
Correct |
3 ms |
5032 KB |
Output is correct |
| 21 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 22 |
Correct |
4 ms |
5048 KB |
Output is correct |
| 23 |
Correct |
4 ms |
5076 KB |
Output is correct |
| 24 |
Correct |
3 ms |
5076 KB |
Output is correct |
| 25 |
Correct |
3 ms |
5036 KB |
Output is correct |
| 26 |
Correct |
6 ms |
5076 KB |
Output is correct |
| 27 |
Correct |
3 ms |
5076 KB |
Output is correct |
| 28 |
Correct |
4 ms |
5044 KB |
Output is correct |
| 29 |
Correct |
4 ms |
5172 KB |
Output is correct |
| 30 |
Correct |
4 ms |
5224 KB |
Output is correct |
| 31 |
Correct |
4 ms |
5076 KB |
Output is correct |
| 32 |
Correct |
3 ms |
5076 KB |
Output is correct |
| 33 |
Correct |
3 ms |
5076 KB |
Output is correct |
| 34 |
Correct |
4 ms |
5092 KB |
Output is correct |
| 35 |
Correct |
4 ms |
5076 KB |
Output is correct |
| 36 |
Correct |
3 ms |
5076 KB |
Output is correct |
| 37 |
Correct |
4 ms |
5048 KB |
Output is correct |
| 38 |
Correct |
3 ms |
5020 KB |
Output is correct |
| 39 |
Correct |
4 ms |
5076 KB |
Output is correct |
| 40 |
Correct |
4 ms |
5164 KB |
Output is correct |
| 41 |
Correct |
3 ms |
5204 KB |
Output is correct |
| 42 |
Correct |
5 ms |
5076 KB |
Output is correct |
| 43 |
Correct |
3 ms |
5132 KB |
Output is correct |
| 44 |
Correct |
4 ms |
5092 KB |
Output is correct |
| 45 |
Correct |
3 ms |
5076 KB |
Output is correct |
| 46 |
Correct |
4 ms |
5076 KB |
Output is correct |
| 47 |
Correct |
4 ms |
5052 KB |
Output is correct |
| 48 |
Correct |
4 ms |
5176 KB |
Output is correct |
| 49 |
Correct |
3 ms |
5204 KB |
Output is correct |
| 50 |
Correct |
3 ms |
5076 KB |
Output is correct |
| 51 |
Correct |
3 ms |
5076 KB |
Output is correct |
| 52 |
Correct |
4 ms |
5076 KB |
Output is correct |
| 53 |
Correct |
3 ms |
5172 KB |
Output is correct |
| 54 |
Correct |
3 ms |
5092 KB |
Output is correct |
| 55 |
Correct |
4 ms |
5040 KB |
Output is correct |
| 56 |
Correct |
4 ms |
5076 KB |
Output is correct |
| 57 |
Correct |
4 ms |
5204 KB |
Output is correct |
| 58 |
Correct |
3 ms |
5076 KB |
Output is correct |
| 59 |
Correct |
4 ms |
5048 KB |
Output is correct |
| 60 |
Correct |
5 ms |
5204 KB |
Output is correct |
| 61 |
Correct |
3 ms |
5148 KB |
Output is correct |
| 62 |
Correct |
4 ms |
5204 KB |
Output is correct |
| 63 |
Correct |
3 ms |
5076 KB |
Output is correct |
| 64 |
Correct |
134 ms |
16156 KB |
Output is correct |
| 65 |
Correct |
136 ms |
16168 KB |
Output is correct |
| 66 |
Correct |
146 ms |
16140 KB |
Output is correct |
| 67 |
Correct |
145 ms |
16080 KB |
Output is correct |
| 68 |
Correct |
147 ms |
16200 KB |
Output is correct |
| 69 |
Correct |
139 ms |
16104 KB |
Output is correct |
| 70 |
Correct |
138 ms |
16188 KB |
Output is correct |
| 71 |
Correct |
202 ms |
16092 KB |
Output is correct |
| 72 |
Correct |
143 ms |
15996 KB |
Output is correct |
| 73 |
Correct |
166 ms |
31244 KB |
Output is correct |
| 74 |
Correct |
160 ms |
31236 KB |
Output is correct |
| 75 |
Correct |
144 ms |
15972 KB |
Output is correct |
| 76 |
Correct |
153 ms |
15976 KB |
Output is correct |
| 77 |
Correct |
125 ms |
16008 KB |
Output is correct |
| 78 |
Correct |
125 ms |
16032 KB |
Output is correct |
| 79 |
Correct |
119 ms |
15980 KB |
Output is correct |
| 80 |
Correct |
120 ms |
15976 KB |
Output is correct |
| 81 |
Correct |
110 ms |
16488 KB |
Output is correct |
| 82 |
Correct |
110 ms |
16204 KB |
Output is correct |
| 83 |
Correct |
132 ms |
22204 KB |
Output is correct |
| 84 |
Correct |
200 ms |
24812 KB |
Output is correct |
| 85 |
Correct |
142 ms |
24504 KB |
Output is correct |
| 86 |
Correct |
115 ms |
17792 KB |
Output is correct |
| 87 |
Correct |
108 ms |
17072 KB |
Output is correct |
| 88 |
Correct |
110 ms |
17504 KB |
Output is correct |
| 89 |
Correct |
132 ms |
17532 KB |
Output is correct |
| 90 |
Correct |
123 ms |
17272 KB |
Output is correct |
| 91 |
Correct |
125 ms |
17588 KB |
Output is correct |
| 92 |
Correct |
162 ms |
17956 KB |
Output is correct |
| 93 |
Correct |
151 ms |
20872 KB |
Output is correct |
| 94 |
Correct |
111 ms |
22900 KB |
Output is correct |
| 95 |
Correct |
113 ms |
21304 KB |
Output is correct |
| 96 |
Correct |
108 ms |
19132 KB |
Output is correct |
| 97 |
Correct |
110 ms |
17252 KB |
Output is correct |
| 98 |
Correct |
107 ms |
16656 KB |
Output is correct |
| 99 |
Correct |
123 ms |
16520 KB |
Output is correct |
| 100 |
Correct |
121 ms |
20344 KB |
Output is correct |
| 101 |
Correct |
142 ms |
17928 KB |
Output is correct |
| 102 |
Correct |
105 ms |
16924 KB |
Output is correct |
| 103 |
Correct |
120 ms |
16720 KB |
Output is correct |
| 104 |
Correct |
73 ms |
16868 KB |
Output is correct |
| 105 |
Correct |
143 ms |
27320 KB |
Output is correct |
| 106 |
Correct |
68 ms |
16872 KB |
Output is correct |
| 107 |
Correct |
75 ms |
16876 KB |
Output is correct |
| 108 |
Correct |
160 ms |
31980 KB |
Output is correct |
| 109 |
Correct |
73 ms |
16832 KB |
Output is correct |
| 110 |
Correct |
128 ms |
32448 KB |
Output is correct |
| 111 |
Correct |
111 ms |
16056 KB |
Output is correct |
