// Success consists of going from failure to failure without loss of enthusiasm
#include <bits/stdc++.h>
using namespace std;
#define nl '\n'
int main() {
cin.tie(0)->sync_with_stdio(0);
int N; cin >> N;
vector<vector<int>> adj(N);
for(int i = 0; i < N-1; i++) {
int u, v; cin >> u >> v; --u, --v;
adj[u].push_back(v);
adj[v].push_back(u);
}
string S; cin >> S;
vector<int> on(N); for(int i = 0; i < N; i++) on[i] = S[i] - '0';
vector<int> dp(N, 0);
function<void(int, int)> gen = [&](int u, int p) {
dp[u] = -(S[u] - '0');
for(auto v : adj[u]) if (v != p) {
gen(v, u);
dp[u] += max(dp[v], on[v]);
}
// cout << u << " " << max(dp[u], on[u]) << nl;
};
gen(0, -1);
int ans = 0;
function<void(int, int)> dfs = [&](int u, int p) {
// cout << u << " " << dp[u] << nl;
ans = max(ans, max(dp[u], on[u]));
for(auto v : adj[u]) if (v != p) {
ans = max(ans, max(dp[v], on[v]) + on[u]);
dp[u] -= max(dp[v], on[v]);
dp[v] += max(dp[u], on[u]);
dfs(v, u);
dp[v] -= max(dp[u], on[u]);
dp[u] += max(dp[v], on[v]);
}
};
dfs(0, -1);
cout << ans << nl;
return 0;
}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
0 ms |
212 KB |
Output is correct |
| 2 |
Correct |
1 ms |
212 KB |
Output is correct |
| 3 |
Correct |
0 ms |
212 KB |
Output is correct |
| 4 |
Correct |
0 ms |
212 KB |
Output is correct |
| 5 |
Correct |
0 ms |
212 KB |
Output is correct |
| 6 |
Correct |
0 ms |
212 KB |
Output is correct |
| 7 |
Correct |
0 ms |
212 KB |
Output is correct |
| 8 |
Correct |
0 ms |
212 KB |
Output is correct |
| 9 |
Correct |
0 ms |
212 KB |
Output is correct |
| 10 |
Correct |
1 ms |
212 KB |
Output is correct |
| 11 |
Correct |
0 ms |
212 KB |
Output is correct |
| 12 |
Correct |
1 ms |
212 KB |
Output is correct |
| 13 |
Correct |
0 ms |
212 KB |
Output is correct |
| 14 |
Correct |
0 ms |
212 KB |
Output is correct |
| 15 |
Correct |
0 ms |
212 KB |
Output is correct |
| 16 |
Correct |
1 ms |
316 KB |
Output is correct |
| 17 |
Correct |
1 ms |
212 KB |
Output is correct |
| 18 |
Correct |
0 ms |
212 KB |
Output is correct |
| 19 |
Correct |
1 ms |
320 KB |
Output is correct |
| 20 |
Correct |
0 ms |
212 KB |
Output is correct |
| 21 |
Correct |
1 ms |
212 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
0 ms |
212 KB |
Output is correct |
| 2 |
Correct |
1 ms |
212 KB |
Output is correct |
| 3 |
Correct |
0 ms |
212 KB |
Output is correct |
| 4 |
Correct |
0 ms |
212 KB |
Output is correct |
| 5 |
Correct |
0 ms |
212 KB |
Output is correct |
| 6 |
Correct |
0 ms |
212 KB |
Output is correct |
| 7 |
Correct |
0 ms |
212 KB |
Output is correct |
| 8 |
Correct |
0 ms |
212 KB |
Output is correct |
| 9 |
Correct |
0 ms |
212 KB |
Output is correct |
| 10 |
Correct |
1 ms |
212 KB |
Output is correct |
| 11 |
Correct |
0 ms |
212 KB |
Output is correct |
| 12 |
Correct |
1 ms |
212 KB |
Output is correct |
| 13 |
Correct |
0 ms |
212 KB |
Output is correct |
| 14 |
Correct |
0 ms |
212 KB |
Output is correct |
| 15 |
Correct |
0 ms |
212 KB |
Output is correct |
| 16 |
Correct |
1 ms |
316 KB |
Output is correct |
| 17 |
Correct |
1 ms |
212 KB |
Output is correct |
| 18 |
Correct |
0 ms |
212 KB |
Output is correct |
| 19 |
Correct |
1 ms |
320 KB |
Output is correct |
| 20 |
Correct |
0 ms |
212 KB |
Output is correct |
| 21 |
Correct |
1 ms |
212 KB |
Output is correct |
| 22 |
Correct |
1 ms |
468 KB |
Output is correct |
| 23 |
Correct |
1 ms |
468 KB |
Output is correct |
| 24 |
Correct |
1 ms |
468 KB |
Output is correct |
| 25 |
Correct |
1 ms |
456 KB |
Output is correct |
| 26 |
Correct |
1 ms |
460 KB |
Output is correct |
| 27 |
Correct |
1 ms |
464 KB |
Output is correct |
| 28 |
Correct |
1 ms |
468 KB |
Output is correct |
| 29 |
Correct |
1 ms |
596 KB |
Output is correct |
| 30 |
Correct |
1 ms |
468 KB |
Output is correct |
| 31 |
Correct |
2 ms |
456 KB |
Output is correct |
| 32 |
Correct |
1 ms |
468 KB |
Output is correct |
| 33 |
Correct |
1 ms |
456 KB |
Output is correct |
| 34 |
Correct |
1 ms |
468 KB |
Output is correct |
| 35 |
Correct |
1 ms |
468 KB |
Output is correct |
| 36 |
Correct |
1 ms |
460 KB |
Output is correct |
| 37 |
Correct |
1 ms |
460 KB |
Output is correct |
| 38 |
Correct |
1 ms |
464 KB |
Output is correct |
| 39 |
Correct |
1 ms |
468 KB |
Output is correct |
| 40 |
Correct |
1 ms |
468 KB |
Output is correct |
| 41 |
Correct |
1 ms |
468 KB |
Output is correct |
| 42 |
Correct |
1 ms |
468 KB |
Output is correct |
| 43 |
Correct |
1 ms |
468 KB |
Output is correct |
| 44 |
Correct |
1 ms |
468 KB |
Output is correct |
| 45 |
Correct |
1 ms |
468 KB |
Output is correct |
| 46 |
Correct |
1 ms |
412 KB |
Output is correct |
| 47 |
Correct |
1 ms |
468 KB |
Output is correct |
| 48 |
Correct |
1 ms |
464 KB |
Output is correct |
| 49 |
Correct |
1 ms |
468 KB |
Output is correct |
| 50 |
Correct |
1 ms |
468 KB |
Output is correct |
| 51 |
Correct |
1 ms |
468 KB |
Output is correct |
| 52 |
Correct |
1 ms |
468 KB |
Output is correct |
| 53 |
Correct |
1 ms |
468 KB |
Output is correct |
| 54 |
Correct |
1 ms |
420 KB |
Output is correct |
| 55 |
Correct |
1 ms |
456 KB |
Output is correct |
| 56 |
Correct |
1 ms |
468 KB |
Output is correct |
| 57 |
Correct |
2 ms |
596 KB |
Output is correct |
| 58 |
Correct |
1 ms |
468 KB |
Output is correct |
| 59 |
Correct |
1 ms |
468 KB |
Output is correct |
| 60 |
Correct |
1 ms |
468 KB |
Output is correct |
| 61 |
Correct |
1 ms |
468 KB |
Output is correct |
| 62 |
Correct |
1 ms |
596 KB |
Output is correct |
| 63 |
Correct |
1 ms |
468 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
0 ms |
212 KB |
Output is correct |
| 2 |
Correct |
1 ms |
212 KB |
Output is correct |
| 3 |
Correct |
0 ms |
212 KB |
Output is correct |
| 4 |
Correct |
0 ms |
212 KB |
Output is correct |
| 5 |
Correct |
0 ms |
212 KB |
Output is correct |
| 6 |
Correct |
0 ms |
212 KB |
Output is correct |
| 7 |
Correct |
0 ms |
212 KB |
Output is correct |
| 8 |
Correct |
0 ms |
212 KB |
Output is correct |
| 9 |
Correct |
0 ms |
212 KB |
Output is correct |
| 10 |
Correct |
1 ms |
212 KB |
Output is correct |
| 11 |
Correct |
0 ms |
212 KB |
Output is correct |
| 12 |
Correct |
1 ms |
212 KB |
Output is correct |
| 13 |
Correct |
0 ms |
212 KB |
Output is correct |
| 14 |
Correct |
0 ms |
212 KB |
Output is correct |
| 15 |
Correct |
0 ms |
212 KB |
Output is correct |
| 16 |
Correct |
1 ms |
316 KB |
Output is correct |
| 17 |
Correct |
1 ms |
212 KB |
Output is correct |
| 18 |
Correct |
0 ms |
212 KB |
Output is correct |
| 19 |
Correct |
1 ms |
320 KB |
Output is correct |
| 20 |
Correct |
0 ms |
212 KB |
Output is correct |
| 21 |
Correct |
1 ms |
212 KB |
Output is correct |
| 22 |
Correct |
1 ms |
468 KB |
Output is correct |
| 23 |
Correct |
1 ms |
468 KB |
Output is correct |
| 24 |
Correct |
1 ms |
468 KB |
Output is correct |
| 25 |
Correct |
1 ms |
456 KB |
Output is correct |
| 26 |
Correct |
1 ms |
460 KB |
Output is correct |
| 27 |
Correct |
1 ms |
464 KB |
Output is correct |
| 28 |
Correct |
1 ms |
468 KB |
Output is correct |
| 29 |
Correct |
1 ms |
596 KB |
Output is correct |
| 30 |
Correct |
1 ms |
468 KB |
Output is correct |
| 31 |
Correct |
2 ms |
456 KB |
Output is correct |
| 32 |
Correct |
1 ms |
468 KB |
Output is correct |
| 33 |
Correct |
1 ms |
456 KB |
Output is correct |
| 34 |
Correct |
1 ms |
468 KB |
Output is correct |
| 35 |
Correct |
1 ms |
468 KB |
Output is correct |
| 36 |
Correct |
1 ms |
460 KB |
Output is correct |
| 37 |
Correct |
1 ms |
460 KB |
Output is correct |
| 38 |
Correct |
1 ms |
464 KB |
Output is correct |
| 39 |
Correct |
1 ms |
468 KB |
Output is correct |
| 40 |
Correct |
1 ms |
468 KB |
Output is correct |
| 41 |
Correct |
1 ms |
468 KB |
Output is correct |
| 42 |
Correct |
1 ms |
468 KB |
Output is correct |
| 43 |
Correct |
1 ms |
468 KB |
Output is correct |
| 44 |
Correct |
1 ms |
468 KB |
Output is correct |
| 45 |
Correct |
1 ms |
468 KB |
Output is correct |
| 46 |
Correct |
1 ms |
412 KB |
Output is correct |
| 47 |
Correct |
1 ms |
468 KB |
Output is correct |
| 48 |
Correct |
1 ms |
464 KB |
Output is correct |
| 49 |
Correct |
1 ms |
468 KB |
Output is correct |
| 50 |
Correct |
1 ms |
468 KB |
Output is correct |
| 51 |
Correct |
1 ms |
468 KB |
Output is correct |
| 52 |
Correct |
1 ms |
468 KB |
Output is correct |
| 53 |
Correct |
1 ms |
468 KB |
Output is correct |
| 54 |
Correct |
1 ms |
420 KB |
Output is correct |
| 55 |
Correct |
1 ms |
456 KB |
Output is correct |
| 56 |
Correct |
1 ms |
468 KB |
Output is correct |
| 57 |
Correct |
2 ms |
596 KB |
Output is correct |
| 58 |
Correct |
1 ms |
468 KB |
Output is correct |
| 59 |
Correct |
1 ms |
468 KB |
Output is correct |
| 60 |
Correct |
1 ms |
468 KB |
Output is correct |
| 61 |
Correct |
1 ms |
468 KB |
Output is correct |
| 62 |
Correct |
1 ms |
596 KB |
Output is correct |
| 63 |
Correct |
1 ms |
468 KB |
Output is correct |
| 64 |
Correct |
155 ms |
15964 KB |
Output is correct |
| 65 |
Correct |
161 ms |
16004 KB |
Output is correct |
| 66 |
Correct |
155 ms |
16048 KB |
Output is correct |
| 67 |
Correct |
148 ms |
15940 KB |
Output is correct |
| 68 |
Correct |
148 ms |
15968 KB |
Output is correct |
| 69 |
Correct |
152 ms |
16020 KB |
Output is correct |
| 70 |
Correct |
147 ms |
15956 KB |
Output is correct |
| 71 |
Correct |
146 ms |
15884 KB |
Output is correct |
| 72 |
Correct |
153 ms |
15968 KB |
Output is correct |
| 73 |
Correct |
173 ms |
31128 KB |
Output is correct |
| 74 |
Correct |
167 ms |
31016 KB |
Output is correct |
| 75 |
Correct |
148 ms |
15868 KB |
Output is correct |
| 76 |
Correct |
140 ms |
15804 KB |
Output is correct |
| 77 |
Correct |
154 ms |
15812 KB |
Output is correct |
| 78 |
Correct |
151 ms |
15824 KB |
Output is correct |
| 79 |
Correct |
150 ms |
15888 KB |
Output is correct |
| 80 |
Correct |
148 ms |
15884 KB |
Output is correct |
| 81 |
Correct |
116 ms |
16316 KB |
Output is correct |
| 82 |
Correct |
130 ms |
15996 KB |
Output is correct |
| 83 |
Correct |
170 ms |
22096 KB |
Output is correct |
| 84 |
Correct |
161 ms |
24716 KB |
Output is correct |
| 85 |
Correct |
159 ms |
24212 KB |
Output is correct |
| 86 |
Correct |
147 ms |
17548 KB |
Output is correct |
| 87 |
Correct |
149 ms |
16872 KB |
Output is correct |
| 88 |
Correct |
134 ms |
17348 KB |
Output is correct |
| 89 |
Correct |
137 ms |
17264 KB |
Output is correct |
| 90 |
Correct |
139 ms |
17076 KB |
Output is correct |
| 91 |
Correct |
136 ms |
17324 KB |
Output is correct |
| 92 |
Correct |
141 ms |
17704 KB |
Output is correct |
| 93 |
Correct |
134 ms |
20572 KB |
Output is correct |
| 94 |
Correct |
136 ms |
22692 KB |
Output is correct |
| 95 |
Correct |
137 ms |
21180 KB |
Output is correct |
| 96 |
Correct |
152 ms |
19044 KB |
Output is correct |
| 97 |
Correct |
141 ms |
17136 KB |
Output is correct |
| 98 |
Correct |
138 ms |
16572 KB |
Output is correct |
| 99 |
Correct |
139 ms |
16340 KB |
Output is correct |
| 100 |
Correct |
146 ms |
20168 KB |
Output is correct |
| 101 |
Correct |
155 ms |
17672 KB |
Output is correct |
| 102 |
Correct |
140 ms |
16696 KB |
Output is correct |
| 103 |
Correct |
142 ms |
16460 KB |
Output is correct |
| 104 |
Correct |
82 ms |
16812 KB |
Output is correct |
| 105 |
Correct |
168 ms |
27324 KB |
Output is correct |
| 106 |
Correct |
74 ms |
16684 KB |
Output is correct |
| 107 |
Correct |
71 ms |
16684 KB |
Output is correct |
| 108 |
Correct |
176 ms |
31948 KB |
Output is correct |
| 109 |
Correct |
95 ms |
16892 KB |
Output is correct |
| 110 |
Correct |
176 ms |
32544 KB |
Output is correct |
| 111 |
Correct |
139 ms |
15776 KB |
Output is correct |
