#include <bits/stdc++.h>
#define fastio ios_base :: sync_with_stdio(0), cin.tie(0);
using namespace std;
using ll = long long;
const int mxN = 1e6 + 5, mod = 1e9 + 7;
int n, d[mxN], b[mxN], ans; string a;
vector <int> adj[mxN];
void calc(int v, int p = -1) {
for (auto to : adj[v]) {
if (to != p) {
calc(to, v);
d[v] += d[to];
}
}
if (d[v] > 0)
d[v] -= a[v - 1];
if (!d[v])
d[v] = a[v - 1];
}
void dfs(int v, int p = -1) {
int ret = 0, cnt = 0;
for (auto to : adj[v]) {
if (d[to] > 0)
++cnt;
ret += d[to];
}
if (cnt <= 1) ret += a[v - 1];
else {
if (ret > 0) ret -= a[v - 1];
if (!ret) ret = a[v - 1];
}
ans = max(ans, ret);
for (auto to : adj[v]) {
if (to != p) {
int dv = d[v], dto = d[to];
d[v] -= d[to];
if (d[v] <= 1) {
if (a[v - 1])
d[v] = 1;
}
if (d[to] == 1 && a[to - 1] == 1) d[to] = 0;
d[to] += d[v];
if (d[to] > 0) d[to] -= a[to - 1];
if (!d[to]) d[to] = a[to - 1];
dfs(to, v);
d[v] = dv, d[to] = dto;
}
}
}
int main() {
fastio;
cin >> n;
for (int i = 1, u, v; i < n; ++i) {
cin >> u >> v;
adj[u].push_back(v);
adj[v].push_back(u);
}
cin >> a;
for (auto &x : a) x -= '0';
calc(1); dfs(1);
cout << ans;
return 0;
}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
11 ms |
23756 KB |
Output is correct |
| 2 |
Correct |
11 ms |
23764 KB |
Output is correct |
| 3 |
Correct |
11 ms |
23808 KB |
Output is correct |
| 4 |
Correct |
13 ms |
23808 KB |
Output is correct |
| 5 |
Correct |
12 ms |
23740 KB |
Output is correct |
| 6 |
Correct |
11 ms |
23756 KB |
Output is correct |
| 7 |
Correct |
12 ms |
23812 KB |
Output is correct |
| 8 |
Correct |
12 ms |
23756 KB |
Output is correct |
| 9 |
Correct |
12 ms |
23816 KB |
Output is correct |
| 10 |
Correct |
13 ms |
23740 KB |
Output is correct |
| 11 |
Correct |
14 ms |
23708 KB |
Output is correct |
| 12 |
Correct |
12 ms |
23756 KB |
Output is correct |
| 13 |
Correct |
12 ms |
23756 KB |
Output is correct |
| 14 |
Correct |
12 ms |
23812 KB |
Output is correct |
| 15 |
Correct |
12 ms |
23688 KB |
Output is correct |
| 16 |
Correct |
12 ms |
23756 KB |
Output is correct |
| 17 |
Correct |
11 ms |
23756 KB |
Output is correct |
| 18 |
Correct |
12 ms |
23756 KB |
Output is correct |
| 19 |
Correct |
12 ms |
23744 KB |
Output is correct |
| 20 |
Correct |
12 ms |
23788 KB |
Output is correct |
| 21 |
Correct |
12 ms |
23796 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
11 ms |
23756 KB |
Output is correct |
| 2 |
Correct |
11 ms |
23764 KB |
Output is correct |
| 3 |
Correct |
11 ms |
23808 KB |
Output is correct |
| 4 |
Correct |
13 ms |
23808 KB |
Output is correct |
| 5 |
Correct |
12 ms |
23740 KB |
Output is correct |
| 6 |
Correct |
11 ms |
23756 KB |
Output is correct |
| 7 |
Correct |
12 ms |
23812 KB |
Output is correct |
| 8 |
Correct |
12 ms |
23756 KB |
Output is correct |
| 9 |
Correct |
12 ms |
23816 KB |
Output is correct |
| 10 |
Correct |
13 ms |
23740 KB |
Output is correct |
| 11 |
Correct |
14 ms |
23708 KB |
Output is correct |
| 12 |
Correct |
12 ms |
23756 KB |
Output is correct |
| 13 |
Correct |
12 ms |
23756 KB |
Output is correct |
| 14 |
Correct |
12 ms |
23812 KB |
Output is correct |
| 15 |
Correct |
12 ms |
23688 KB |
Output is correct |
| 16 |
Correct |
12 ms |
23756 KB |
Output is correct |
| 17 |
Correct |
11 ms |
23756 KB |
Output is correct |
| 18 |
Correct |
12 ms |
23756 KB |
Output is correct |
| 19 |
Correct |
12 ms |
23744 KB |
Output is correct |
| 20 |
Correct |
12 ms |
23788 KB |
Output is correct |
| 21 |
Correct |
12 ms |
23796 KB |
Output is correct |
| 22 |
Correct |
13 ms |
23872 KB |
Output is correct |
| 23 |
Correct |
13 ms |
23884 KB |
Output is correct |
| 24 |
Correct |
12 ms |
23888 KB |
Output is correct |
| 25 |
Correct |
12 ms |
23824 KB |
Output is correct |
| 26 |
Correct |
12 ms |
23884 KB |
Output is correct |
| 27 |
Correct |
12 ms |
23884 KB |
Output is correct |
| 28 |
Correct |
12 ms |
23816 KB |
Output is correct |
| 29 |
Correct |
13 ms |
24012 KB |
Output is correct |
| 30 |
Correct |
15 ms |
23876 KB |
Output is correct |
| 31 |
Correct |
13 ms |
23884 KB |
Output is correct |
| 32 |
Correct |
12 ms |
23884 KB |
Output is correct |
| 33 |
Correct |
14 ms |
23884 KB |
Output is correct |
| 34 |
Correct |
16 ms |
23864 KB |
Output is correct |
| 35 |
Correct |
12 ms |
23884 KB |
Output is correct |
| 36 |
Correct |
13 ms |
23796 KB |
Output is correct |
| 37 |
Correct |
13 ms |
23852 KB |
Output is correct |
| 38 |
Correct |
12 ms |
23884 KB |
Output is correct |
| 39 |
Correct |
12 ms |
23920 KB |
Output is correct |
| 40 |
Correct |
12 ms |
23896 KB |
Output is correct |
| 41 |
Correct |
12 ms |
23884 KB |
Output is correct |
| 42 |
Correct |
13 ms |
23928 KB |
Output is correct |
| 43 |
Correct |
16 ms |
23820 KB |
Output is correct |
| 44 |
Correct |
14 ms |
23884 KB |
Output is correct |
| 45 |
Correct |
16 ms |
23884 KB |
Output is correct |
| 46 |
Correct |
18 ms |
23808 KB |
Output is correct |
| 47 |
Correct |
13 ms |
23884 KB |
Output is correct |
| 48 |
Correct |
15 ms |
23888 KB |
Output is correct |
| 49 |
Correct |
12 ms |
23884 KB |
Output is correct |
| 50 |
Correct |
12 ms |
23936 KB |
Output is correct |
| 51 |
Correct |
12 ms |
23884 KB |
Output is correct |
| 52 |
Correct |
12 ms |
23884 KB |
Output is correct |
| 53 |
Correct |
12 ms |
23820 KB |
Output is correct |
| 54 |
Correct |
12 ms |
23864 KB |
Output is correct |
| 55 |
Correct |
12 ms |
23884 KB |
Output is correct |
| 56 |
Correct |
12 ms |
23856 KB |
Output is correct |
| 57 |
Correct |
15 ms |
24012 KB |
Output is correct |
| 58 |
Correct |
13 ms |
23796 KB |
Output is correct |
| 59 |
Correct |
13 ms |
23884 KB |
Output is correct |
| 60 |
Correct |
13 ms |
23884 KB |
Output is correct |
| 61 |
Correct |
13 ms |
23904 KB |
Output is correct |
| 62 |
Correct |
14 ms |
24012 KB |
Output is correct |
| 63 |
Correct |
14 ms |
23900 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
11 ms |
23756 KB |
Output is correct |
| 2 |
Correct |
11 ms |
23764 KB |
Output is correct |
| 3 |
Correct |
11 ms |
23808 KB |
Output is correct |
| 4 |
Correct |
13 ms |
23808 KB |
Output is correct |
| 5 |
Correct |
12 ms |
23740 KB |
Output is correct |
| 6 |
Correct |
11 ms |
23756 KB |
Output is correct |
| 7 |
Correct |
12 ms |
23812 KB |
Output is correct |
| 8 |
Correct |
12 ms |
23756 KB |
Output is correct |
| 9 |
Correct |
12 ms |
23816 KB |
Output is correct |
| 10 |
Correct |
13 ms |
23740 KB |
Output is correct |
| 11 |
Correct |
14 ms |
23708 KB |
Output is correct |
| 12 |
Correct |
12 ms |
23756 KB |
Output is correct |
| 13 |
Correct |
12 ms |
23756 KB |
Output is correct |
| 14 |
Correct |
12 ms |
23812 KB |
Output is correct |
| 15 |
Correct |
12 ms |
23688 KB |
Output is correct |
| 16 |
Correct |
12 ms |
23756 KB |
Output is correct |
| 17 |
Correct |
11 ms |
23756 KB |
Output is correct |
| 18 |
Correct |
12 ms |
23756 KB |
Output is correct |
| 19 |
Correct |
12 ms |
23744 KB |
Output is correct |
| 20 |
Correct |
12 ms |
23788 KB |
Output is correct |
| 21 |
Correct |
12 ms |
23796 KB |
Output is correct |
| 22 |
Correct |
13 ms |
23872 KB |
Output is correct |
| 23 |
Correct |
13 ms |
23884 KB |
Output is correct |
| 24 |
Correct |
12 ms |
23888 KB |
Output is correct |
| 25 |
Correct |
12 ms |
23824 KB |
Output is correct |
| 26 |
Correct |
12 ms |
23884 KB |
Output is correct |
| 27 |
Correct |
12 ms |
23884 KB |
Output is correct |
| 28 |
Correct |
12 ms |
23816 KB |
Output is correct |
| 29 |
Correct |
13 ms |
24012 KB |
Output is correct |
| 30 |
Correct |
15 ms |
23876 KB |
Output is correct |
| 31 |
Correct |
13 ms |
23884 KB |
Output is correct |
| 32 |
Correct |
12 ms |
23884 KB |
Output is correct |
| 33 |
Correct |
14 ms |
23884 KB |
Output is correct |
| 34 |
Correct |
16 ms |
23864 KB |
Output is correct |
| 35 |
Correct |
12 ms |
23884 KB |
Output is correct |
| 36 |
Correct |
13 ms |
23796 KB |
Output is correct |
| 37 |
Correct |
13 ms |
23852 KB |
Output is correct |
| 38 |
Correct |
12 ms |
23884 KB |
Output is correct |
| 39 |
Correct |
12 ms |
23920 KB |
Output is correct |
| 40 |
Correct |
12 ms |
23896 KB |
Output is correct |
| 41 |
Correct |
12 ms |
23884 KB |
Output is correct |
| 42 |
Correct |
13 ms |
23928 KB |
Output is correct |
| 43 |
Correct |
16 ms |
23820 KB |
Output is correct |
| 44 |
Correct |
14 ms |
23884 KB |
Output is correct |
| 45 |
Correct |
16 ms |
23884 KB |
Output is correct |
| 46 |
Correct |
18 ms |
23808 KB |
Output is correct |
| 47 |
Correct |
13 ms |
23884 KB |
Output is correct |
| 48 |
Correct |
15 ms |
23888 KB |
Output is correct |
| 49 |
Correct |
12 ms |
23884 KB |
Output is correct |
| 50 |
Correct |
12 ms |
23936 KB |
Output is correct |
| 51 |
Correct |
12 ms |
23884 KB |
Output is correct |
| 52 |
Correct |
12 ms |
23884 KB |
Output is correct |
| 53 |
Correct |
12 ms |
23820 KB |
Output is correct |
| 54 |
Correct |
12 ms |
23864 KB |
Output is correct |
| 55 |
Correct |
12 ms |
23884 KB |
Output is correct |
| 56 |
Correct |
12 ms |
23856 KB |
Output is correct |
| 57 |
Correct |
15 ms |
24012 KB |
Output is correct |
| 58 |
Correct |
13 ms |
23796 KB |
Output is correct |
| 59 |
Correct |
13 ms |
23884 KB |
Output is correct |
| 60 |
Correct |
13 ms |
23884 KB |
Output is correct |
| 61 |
Correct |
13 ms |
23904 KB |
Output is correct |
| 62 |
Correct |
14 ms |
24012 KB |
Output is correct |
| 63 |
Correct |
14 ms |
23900 KB |
Output is correct |
| 64 |
Correct |
139 ms |
31292 KB |
Output is correct |
| 65 |
Correct |
158 ms |
34000 KB |
Output is correct |
| 66 |
Correct |
138 ms |
33908 KB |
Output is correct |
| 67 |
Correct |
170 ms |
34052 KB |
Output is correct |
| 68 |
Correct |
137 ms |
33964 KB |
Output is correct |
| 69 |
Correct |
172 ms |
34064 KB |
Output is correct |
| 70 |
Correct |
139 ms |
34000 KB |
Output is correct |
| 71 |
Correct |
145 ms |
33936 KB |
Output is correct |
| 72 |
Correct |
167 ms |
34256 KB |
Output is correct |
| 73 |
Correct |
173 ms |
49124 KB |
Output is correct |
| 74 |
Correct |
166 ms |
48980 KB |
Output is correct |
| 75 |
Correct |
142 ms |
33988 KB |
Output is correct |
| 76 |
Correct |
143 ms |
33788 KB |
Output is correct |
| 77 |
Correct |
142 ms |
33792 KB |
Output is correct |
| 78 |
Correct |
146 ms |
33984 KB |
Output is correct |
| 79 |
Correct |
150 ms |
33808 KB |
Output is correct |
| 80 |
Correct |
159 ms |
33836 KB |
Output is correct |
| 81 |
Correct |
125 ms |
34236 KB |
Output is correct |
| 82 |
Correct |
138 ms |
34172 KB |
Output is correct |
| 83 |
Correct |
152 ms |
40032 KB |
Output is correct |
| 84 |
Correct |
156 ms |
42632 KB |
Output is correct |
| 85 |
Correct |
169 ms |
42320 KB |
Output is correct |
| 86 |
Correct |
156 ms |
35664 KB |
Output is correct |
| 87 |
Correct |
170 ms |
34904 KB |
Output is correct |
| 88 |
Correct |
135 ms |
35264 KB |
Output is correct |
| 89 |
Correct |
141 ms |
35444 KB |
Output is correct |
| 90 |
Correct |
147 ms |
35044 KB |
Output is correct |
| 91 |
Correct |
136 ms |
35304 KB |
Output is correct |
| 92 |
Correct |
145 ms |
35840 KB |
Output is correct |
| 93 |
Correct |
138 ms |
38696 KB |
Output is correct |
| 94 |
Correct |
141 ms |
40748 KB |
Output is correct |
| 95 |
Correct |
129 ms |
39100 KB |
Output is correct |
| 96 |
Correct |
151 ms |
37000 KB |
Output is correct |
| 97 |
Correct |
136 ms |
35064 KB |
Output is correct |
| 98 |
Correct |
139 ms |
34532 KB |
Output is correct |
| 99 |
Correct |
129 ms |
34240 KB |
Output is correct |
| 100 |
Correct |
132 ms |
38128 KB |
Output is correct |
| 101 |
Correct |
151 ms |
35676 KB |
Output is correct |
| 102 |
Correct |
133 ms |
34820 KB |
Output is correct |
| 103 |
Correct |
158 ms |
34516 KB |
Output is correct |
| 104 |
Correct |
84 ms |
34744 KB |
Output is correct |
| 105 |
Correct |
168 ms |
45208 KB |
Output is correct |
| 106 |
Correct |
94 ms |
34652 KB |
Output is correct |
| 107 |
Correct |
86 ms |
34640 KB |
Output is correct |
| 108 |
Correct |
170 ms |
50084 KB |
Output is correct |
| 109 |
Correct |
85 ms |
34920 KB |
Output is correct |
| 110 |
Correct |
188 ms |
50412 KB |
Output is correct |
| 111 |
Correct |
129 ms |
33916 KB |
Output is correct |
