#include "bits/stdc++.h"
using namespace std;
#define ar array
//~ #define int long long
const int N = 2e3 + 5;
vector<int> edges[N];
int a[N], dp[N], res, up[N];
void dfs(int u, int p = -1){
for(auto x : edges[u]){
if(x == p) continue;
dfs(x, u);
dp[u] += dp[x];
}
dp[u] = max(dp[u] - a[u], a[u]);
}
void redfs(int u, int p = -1){
for(auto x : edges[u]){
if(x == p) continue;
up[x] += up[u];
up[u] += dp[x];
} up[u] = max(up[u] - a[u], a[u]);
res = max(up[u], res);
up[u] = 0;
reverse(edges[u].begin(), edges[u].end());
for(auto x : edges[u]){
if(x == p) continue;
up[x] += up[u];
up[u] += dp[x];
up[x] = max(up[x] - a[u], a[u]);
redfs(x, u);
}
}
signed main(){
ios::sync_with_stdio(0); cin.tie(0);
int n; cin>>n;
for(int i=1;i<n;i++){
int a, b; cin>>a>>b;
edges[a].push_back(b);
edges[b].push_back(a);
} for(int i=1;i<=n;i++){
char c; cin>>c;
a[i] = c - '0';
}
for(int i=1;i<=n;i++){
for(auto x : edges[i]){
if(a[x] && a[i]) res = 2;
}
}
dfs(1);
redfs(1);
cout<<res<<"\n";
}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
332 KB |
Output is correct |
| 2 |
Correct |
0 ms |
332 KB |
Output is correct |
| 3 |
Correct |
1 ms |
332 KB |
Output is correct |
| 4 |
Correct |
0 ms |
332 KB |
Output is correct |
| 5 |
Correct |
0 ms |
332 KB |
Output is correct |
| 6 |
Correct |
0 ms |
332 KB |
Output is correct |
| 7 |
Correct |
1 ms |
332 KB |
Output is correct |
| 8 |
Correct |
0 ms |
332 KB |
Output is correct |
| 9 |
Correct |
0 ms |
332 KB |
Output is correct |
| 10 |
Correct |
0 ms |
332 KB |
Output is correct |
| 11 |
Correct |
0 ms |
332 KB |
Output is correct |
| 12 |
Correct |
0 ms |
332 KB |
Output is correct |
| 13 |
Correct |
0 ms |
332 KB |
Output is correct |
| 14 |
Correct |
0 ms |
332 KB |
Output is correct |
| 15 |
Correct |
0 ms |
332 KB |
Output is correct |
| 16 |
Correct |
1 ms |
332 KB |
Output is correct |
| 17 |
Correct |
1 ms |
332 KB |
Output is correct |
| 18 |
Correct |
1 ms |
332 KB |
Output is correct |
| 19 |
Correct |
0 ms |
332 KB |
Output is correct |
| 20 |
Correct |
0 ms |
332 KB |
Output is correct |
| 21 |
Correct |
1 ms |
332 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
332 KB |
Output is correct |
| 2 |
Correct |
0 ms |
332 KB |
Output is correct |
| 3 |
Correct |
1 ms |
332 KB |
Output is correct |
| 4 |
Correct |
0 ms |
332 KB |
Output is correct |
| 5 |
Correct |
0 ms |
332 KB |
Output is correct |
| 6 |
Correct |
0 ms |
332 KB |
Output is correct |
| 7 |
Correct |
1 ms |
332 KB |
Output is correct |
| 8 |
Correct |
0 ms |
332 KB |
Output is correct |
| 9 |
Correct |
0 ms |
332 KB |
Output is correct |
| 10 |
Correct |
0 ms |
332 KB |
Output is correct |
| 11 |
Correct |
0 ms |
332 KB |
Output is correct |
| 12 |
Correct |
0 ms |
332 KB |
Output is correct |
| 13 |
Correct |
0 ms |
332 KB |
Output is correct |
| 14 |
Correct |
0 ms |
332 KB |
Output is correct |
| 15 |
Correct |
0 ms |
332 KB |
Output is correct |
| 16 |
Correct |
1 ms |
332 KB |
Output is correct |
| 17 |
Correct |
1 ms |
332 KB |
Output is correct |
| 18 |
Correct |
1 ms |
332 KB |
Output is correct |
| 19 |
Correct |
0 ms |
332 KB |
Output is correct |
| 20 |
Correct |
0 ms |
332 KB |
Output is correct |
| 21 |
Correct |
1 ms |
332 KB |
Output is correct |
| 22 |
Correct |
1 ms |
332 KB |
Output is correct |
| 23 |
Correct |
1 ms |
332 KB |
Output is correct |
| 24 |
Correct |
1 ms |
332 KB |
Output is correct |
| 25 |
Correct |
1 ms |
332 KB |
Output is correct |
| 26 |
Correct |
1 ms |
332 KB |
Output is correct |
| 27 |
Correct |
1 ms |
332 KB |
Output is correct |
| 28 |
Correct |
1 ms |
332 KB |
Output is correct |
| 29 |
Correct |
1 ms |
460 KB |
Output is correct |
| 30 |
Correct |
1 ms |
460 KB |
Output is correct |
| 31 |
Correct |
1 ms |
332 KB |
Output is correct |
| 32 |
Correct |
1 ms |
332 KB |
Output is correct |
| 33 |
Correct |
1 ms |
332 KB |
Output is correct |
| 34 |
Correct |
1 ms |
332 KB |
Output is correct |
| 35 |
Correct |
1 ms |
332 KB |
Output is correct |
| 36 |
Correct |
1 ms |
332 KB |
Output is correct |
| 37 |
Correct |
1 ms |
332 KB |
Output is correct |
| 38 |
Correct |
1 ms |
332 KB |
Output is correct |
| 39 |
Correct |
2 ms |
460 KB |
Output is correct |
| 40 |
Correct |
1 ms |
460 KB |
Output is correct |
| 41 |
Correct |
1 ms |
460 KB |
Output is correct |
| 42 |
Correct |
1 ms |
460 KB |
Output is correct |
| 43 |
Correct |
1 ms |
460 KB |
Output is correct |
| 44 |
Correct |
1 ms |
460 KB |
Output is correct |
| 45 |
Correct |
1 ms |
460 KB |
Output is correct |
| 46 |
Correct |
1 ms |
460 KB |
Output is correct |
| 47 |
Correct |
1 ms |
460 KB |
Output is correct |
| 48 |
Correct |
1 ms |
460 KB |
Output is correct |
| 49 |
Correct |
1 ms |
460 KB |
Output is correct |
| 50 |
Correct |
1 ms |
460 KB |
Output is correct |
| 51 |
Correct |
2 ms |
460 KB |
Output is correct |
| 52 |
Correct |
2 ms |
332 KB |
Output is correct |
| 53 |
Correct |
1 ms |
460 KB |
Output is correct |
| 54 |
Correct |
1 ms |
460 KB |
Output is correct |
| 55 |
Correct |
1 ms |
460 KB |
Output is correct |
| 56 |
Correct |
1 ms |
460 KB |
Output is correct |
| 57 |
Correct |
1 ms |
460 KB |
Output is correct |
| 58 |
Correct |
1 ms |
460 KB |
Output is correct |
| 59 |
Correct |
1 ms |
332 KB |
Output is correct |
| 60 |
Correct |
1 ms |
460 KB |
Output is correct |
| 61 |
Correct |
1 ms |
332 KB |
Output is correct |
| 62 |
Correct |
1 ms |
460 KB |
Output is correct |
| 63 |
Correct |
1 ms |
332 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
332 KB |
Output is correct |
| 2 |
Correct |
0 ms |
332 KB |
Output is correct |
| 3 |
Correct |
1 ms |
332 KB |
Output is correct |
| 4 |
Correct |
0 ms |
332 KB |
Output is correct |
| 5 |
Correct |
0 ms |
332 KB |
Output is correct |
| 6 |
Correct |
0 ms |
332 KB |
Output is correct |
| 7 |
Correct |
1 ms |
332 KB |
Output is correct |
| 8 |
Correct |
0 ms |
332 KB |
Output is correct |
| 9 |
Correct |
0 ms |
332 KB |
Output is correct |
| 10 |
Correct |
0 ms |
332 KB |
Output is correct |
| 11 |
Correct |
0 ms |
332 KB |
Output is correct |
| 12 |
Correct |
0 ms |
332 KB |
Output is correct |
| 13 |
Correct |
0 ms |
332 KB |
Output is correct |
| 14 |
Correct |
0 ms |
332 KB |
Output is correct |
| 15 |
Correct |
0 ms |
332 KB |
Output is correct |
| 16 |
Correct |
1 ms |
332 KB |
Output is correct |
| 17 |
Correct |
1 ms |
332 KB |
Output is correct |
| 18 |
Correct |
1 ms |
332 KB |
Output is correct |
| 19 |
Correct |
0 ms |
332 KB |
Output is correct |
| 20 |
Correct |
0 ms |
332 KB |
Output is correct |
| 21 |
Correct |
1 ms |
332 KB |
Output is correct |
| 22 |
Correct |
1 ms |
332 KB |
Output is correct |
| 23 |
Correct |
1 ms |
332 KB |
Output is correct |
| 24 |
Correct |
1 ms |
332 KB |
Output is correct |
| 25 |
Correct |
1 ms |
332 KB |
Output is correct |
| 26 |
Correct |
1 ms |
332 KB |
Output is correct |
| 27 |
Correct |
1 ms |
332 KB |
Output is correct |
| 28 |
Correct |
1 ms |
332 KB |
Output is correct |
| 29 |
Correct |
1 ms |
460 KB |
Output is correct |
| 30 |
Correct |
1 ms |
460 KB |
Output is correct |
| 31 |
Correct |
1 ms |
332 KB |
Output is correct |
| 32 |
Correct |
1 ms |
332 KB |
Output is correct |
| 33 |
Correct |
1 ms |
332 KB |
Output is correct |
| 34 |
Correct |
1 ms |
332 KB |
Output is correct |
| 35 |
Correct |
1 ms |
332 KB |
Output is correct |
| 36 |
Correct |
1 ms |
332 KB |
Output is correct |
| 37 |
Correct |
1 ms |
332 KB |
Output is correct |
| 38 |
Correct |
1 ms |
332 KB |
Output is correct |
| 39 |
Correct |
2 ms |
460 KB |
Output is correct |
| 40 |
Correct |
1 ms |
460 KB |
Output is correct |
| 41 |
Correct |
1 ms |
460 KB |
Output is correct |
| 42 |
Correct |
1 ms |
460 KB |
Output is correct |
| 43 |
Correct |
1 ms |
460 KB |
Output is correct |
| 44 |
Correct |
1 ms |
460 KB |
Output is correct |
| 45 |
Correct |
1 ms |
460 KB |
Output is correct |
| 46 |
Correct |
1 ms |
460 KB |
Output is correct |
| 47 |
Correct |
1 ms |
460 KB |
Output is correct |
| 48 |
Correct |
1 ms |
460 KB |
Output is correct |
| 49 |
Correct |
1 ms |
460 KB |
Output is correct |
| 50 |
Correct |
1 ms |
460 KB |
Output is correct |
| 51 |
Correct |
2 ms |
460 KB |
Output is correct |
| 52 |
Correct |
2 ms |
332 KB |
Output is correct |
| 53 |
Correct |
1 ms |
460 KB |
Output is correct |
| 54 |
Correct |
1 ms |
460 KB |
Output is correct |
| 55 |
Correct |
1 ms |
460 KB |
Output is correct |
| 56 |
Correct |
1 ms |
460 KB |
Output is correct |
| 57 |
Correct |
1 ms |
460 KB |
Output is correct |
| 58 |
Correct |
1 ms |
460 KB |
Output is correct |
| 59 |
Correct |
1 ms |
332 KB |
Output is correct |
| 60 |
Correct |
1 ms |
460 KB |
Output is correct |
| 61 |
Correct |
1 ms |
332 KB |
Output is correct |
| 62 |
Correct |
1 ms |
460 KB |
Output is correct |
| 63 |
Correct |
1 ms |
332 KB |
Output is correct |
| 64 |
Runtime error |
1 ms |
460 KB |
Execution killed with signal 11 |
| 65 |
Halted |
0 ms |
0 KB |
- |
