#include <bits/stdc++.h>
int n, ans = 0;
std::vector <std::vector <int>> g;
std::vector <int> mem;
std::string s;
void dfs1(int node, int par = -1) {
for (int x : g[node]) if (x != par) dfs1(x, node);
int r = s[node] == '1';
mem[node] = std::max(mem[node], r);
int sm = 0;
for (int x : g[node]) if (x != par) sm += mem[x];
mem[node] = std::max(mem[node], sm - r);
}
void dfs2(int node, int par = -1) {
ans = std::max(ans, mem[node]);
for (int x : g[node]) if (x != par) dfs2(x, node);
int r = s[node] == '1';
if (!r) {
int sm = 0;
for (int x : g[node]) if (x != par) sm += mem[x];
ans = std::max(ans, sm);
} else {
int sm = 0;
for (int x : g[node]) if (x != par) ans = std::max(ans, mem[x] + 1), sm += mem[x];
ans = std::max(ans, sm - 1);
}
}
int main() {
std::ios::sync_with_stdio(0); std::cin.tie(0);
std::cin >> n;
g.resize(n);
mem.resize(n);
for (int i = 0; i < n - 1; i++) {
int u, v; std::cin >> u >> v;
g[u - 1].push_back(v - 1);
g[v - 1].push_back(u - 1);
}
std::cin >> s;
dfs1(0); dfs2(0);
std::cout << ans << "\n";
}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
384 KB |
Output is correct |
| 2 |
Correct |
0 ms |
384 KB |
Output is correct |
| 3 |
Correct |
1 ms |
512 KB |
Output is correct |
| 4 |
Correct |
0 ms |
384 KB |
Output is correct |
| 5 |
Correct |
1 ms |
384 KB |
Output is correct |
| 6 |
Correct |
0 ms |
384 KB |
Output is correct |
| 7 |
Correct |
0 ms |
384 KB |
Output is correct |
| 8 |
Correct |
0 ms |
384 KB |
Output is correct |
| 9 |
Correct |
1 ms |
384 KB |
Output is correct |
| 10 |
Correct |
1 ms |
384 KB |
Output is correct |
| 11 |
Correct |
1 ms |
512 KB |
Output is correct |
| 12 |
Correct |
1 ms |
384 KB |
Output is correct |
| 13 |
Correct |
0 ms |
384 KB |
Output is correct |
| 14 |
Correct |
1 ms |
384 KB |
Output is correct |
| 15 |
Correct |
0 ms |
384 KB |
Output is correct |
| 16 |
Correct |
1 ms |
384 KB |
Output is correct |
| 17 |
Correct |
0 ms |
384 KB |
Output is correct |
| 18 |
Correct |
1 ms |
384 KB |
Output is correct |
| 19 |
Correct |
1 ms |
384 KB |
Output is correct |
| 20 |
Correct |
1 ms |
384 KB |
Output is correct |
| 21 |
Correct |
0 ms |
384 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
384 KB |
Output is correct |
| 2 |
Correct |
0 ms |
384 KB |
Output is correct |
| 3 |
Correct |
1 ms |
512 KB |
Output is correct |
| 4 |
Correct |
0 ms |
384 KB |
Output is correct |
| 5 |
Correct |
1 ms |
384 KB |
Output is correct |
| 6 |
Correct |
0 ms |
384 KB |
Output is correct |
| 7 |
Correct |
0 ms |
384 KB |
Output is correct |
| 8 |
Correct |
0 ms |
384 KB |
Output is correct |
| 9 |
Correct |
1 ms |
384 KB |
Output is correct |
| 10 |
Correct |
1 ms |
384 KB |
Output is correct |
| 11 |
Correct |
1 ms |
512 KB |
Output is correct |
| 12 |
Correct |
1 ms |
384 KB |
Output is correct |
| 13 |
Correct |
0 ms |
384 KB |
Output is correct |
| 14 |
Correct |
1 ms |
384 KB |
Output is correct |
| 15 |
Correct |
0 ms |
384 KB |
Output is correct |
| 16 |
Correct |
1 ms |
384 KB |
Output is correct |
| 17 |
Correct |
0 ms |
384 KB |
Output is correct |
| 18 |
Correct |
1 ms |
384 KB |
Output is correct |
| 19 |
Correct |
1 ms |
384 KB |
Output is correct |
| 20 |
Correct |
1 ms |
384 KB |
Output is correct |
| 21 |
Correct |
0 ms |
384 KB |
Output is correct |
| 22 |
Correct |
1 ms |
512 KB |
Output is correct |
| 23 |
Correct |
1 ms |
416 KB |
Output is correct |
| 24 |
Correct |
1 ms |
512 KB |
Output is correct |
| 25 |
Correct |
1 ms |
512 KB |
Output is correct |
| 26 |
Correct |
2 ms |
512 KB |
Output is correct |
| 27 |
Correct |
1 ms |
512 KB |
Output is correct |
| 28 |
Correct |
1 ms |
512 KB |
Output is correct |
| 29 |
Correct |
1 ms |
640 KB |
Output is correct |
| 30 |
Correct |
1 ms |
512 KB |
Output is correct |
| 31 |
Correct |
1 ms |
512 KB |
Output is correct |
| 32 |
Correct |
2 ms |
512 KB |
Output is correct |
| 33 |
Correct |
1 ms |
512 KB |
Output is correct |
| 34 |
Correct |
1 ms |
512 KB |
Output is correct |
| 35 |
Correct |
2 ms |
512 KB |
Output is correct |
| 36 |
Correct |
1 ms |
512 KB |
Output is correct |
| 37 |
Correct |
1 ms |
512 KB |
Output is correct |
| 38 |
Correct |
1 ms |
512 KB |
Output is correct |
| 39 |
Correct |
1 ms |
512 KB |
Output is correct |
| 40 |
Correct |
1 ms |
512 KB |
Output is correct |
| 41 |
Correct |
1 ms |
512 KB |
Output is correct |
| 42 |
Correct |
2 ms |
512 KB |
Output is correct |
| 43 |
Correct |
1 ms |
512 KB |
Output is correct |
| 44 |
Correct |
1 ms |
512 KB |
Output is correct |
| 45 |
Correct |
1 ms |
512 KB |
Output is correct |
| 46 |
Correct |
2 ms |
512 KB |
Output is correct |
| 47 |
Correct |
1 ms |
512 KB |
Output is correct |
| 48 |
Correct |
1 ms |
512 KB |
Output is correct |
| 49 |
Correct |
1 ms |
512 KB |
Output is correct |
| 50 |
Correct |
1 ms |
640 KB |
Output is correct |
| 51 |
Correct |
2 ms |
512 KB |
Output is correct |
| 52 |
Correct |
1 ms |
512 KB |
Output is correct |
| 53 |
Correct |
1 ms |
512 KB |
Output is correct |
| 54 |
Correct |
1 ms |
512 KB |
Output is correct |
| 55 |
Correct |
1 ms |
544 KB |
Output is correct |
| 56 |
Correct |
1 ms |
512 KB |
Output is correct |
| 57 |
Correct |
2 ms |
640 KB |
Output is correct |
| 58 |
Correct |
1 ms |
512 KB |
Output is correct |
| 59 |
Correct |
1 ms |
512 KB |
Output is correct |
| 60 |
Correct |
1 ms |
512 KB |
Output is correct |
| 61 |
Correct |
1 ms |
512 KB |
Output is correct |
| 62 |
Correct |
1 ms |
640 KB |
Output is correct |
| 63 |
Correct |
1 ms |
512 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
384 KB |
Output is correct |
| 2 |
Correct |
0 ms |
384 KB |
Output is correct |
| 3 |
Correct |
1 ms |
512 KB |
Output is correct |
| 4 |
Correct |
0 ms |
384 KB |
Output is correct |
| 5 |
Correct |
1 ms |
384 KB |
Output is correct |
| 6 |
Correct |
0 ms |
384 KB |
Output is correct |
| 7 |
Correct |
0 ms |
384 KB |
Output is correct |
| 8 |
Correct |
0 ms |
384 KB |
Output is correct |
| 9 |
Correct |
1 ms |
384 KB |
Output is correct |
| 10 |
Correct |
1 ms |
384 KB |
Output is correct |
| 11 |
Correct |
1 ms |
512 KB |
Output is correct |
| 12 |
Correct |
1 ms |
384 KB |
Output is correct |
| 13 |
Correct |
0 ms |
384 KB |
Output is correct |
| 14 |
Correct |
1 ms |
384 KB |
Output is correct |
| 15 |
Correct |
0 ms |
384 KB |
Output is correct |
| 16 |
Correct |
1 ms |
384 KB |
Output is correct |
| 17 |
Correct |
0 ms |
384 KB |
Output is correct |
| 18 |
Correct |
1 ms |
384 KB |
Output is correct |
| 19 |
Correct |
1 ms |
384 KB |
Output is correct |
| 20 |
Correct |
1 ms |
384 KB |
Output is correct |
| 21 |
Correct |
0 ms |
384 KB |
Output is correct |
| 22 |
Correct |
1 ms |
512 KB |
Output is correct |
| 23 |
Correct |
1 ms |
416 KB |
Output is correct |
| 24 |
Correct |
1 ms |
512 KB |
Output is correct |
| 25 |
Correct |
1 ms |
512 KB |
Output is correct |
| 26 |
Correct |
2 ms |
512 KB |
Output is correct |
| 27 |
Correct |
1 ms |
512 KB |
Output is correct |
| 28 |
Correct |
1 ms |
512 KB |
Output is correct |
| 29 |
Correct |
1 ms |
640 KB |
Output is correct |
| 30 |
Correct |
1 ms |
512 KB |
Output is correct |
| 31 |
Correct |
1 ms |
512 KB |
Output is correct |
| 32 |
Correct |
2 ms |
512 KB |
Output is correct |
| 33 |
Correct |
1 ms |
512 KB |
Output is correct |
| 34 |
Correct |
1 ms |
512 KB |
Output is correct |
| 35 |
Correct |
2 ms |
512 KB |
Output is correct |
| 36 |
Correct |
1 ms |
512 KB |
Output is correct |
| 37 |
Correct |
1 ms |
512 KB |
Output is correct |
| 38 |
Correct |
1 ms |
512 KB |
Output is correct |
| 39 |
Correct |
1 ms |
512 KB |
Output is correct |
| 40 |
Correct |
1 ms |
512 KB |
Output is correct |
| 41 |
Correct |
1 ms |
512 KB |
Output is correct |
| 42 |
Correct |
2 ms |
512 KB |
Output is correct |
| 43 |
Correct |
1 ms |
512 KB |
Output is correct |
| 44 |
Correct |
1 ms |
512 KB |
Output is correct |
| 45 |
Correct |
1 ms |
512 KB |
Output is correct |
| 46 |
Correct |
2 ms |
512 KB |
Output is correct |
| 47 |
Correct |
1 ms |
512 KB |
Output is correct |
| 48 |
Correct |
1 ms |
512 KB |
Output is correct |
| 49 |
Correct |
1 ms |
512 KB |
Output is correct |
| 50 |
Correct |
1 ms |
640 KB |
Output is correct |
| 51 |
Correct |
2 ms |
512 KB |
Output is correct |
| 52 |
Correct |
1 ms |
512 KB |
Output is correct |
| 53 |
Correct |
1 ms |
512 KB |
Output is correct |
| 54 |
Correct |
1 ms |
512 KB |
Output is correct |
| 55 |
Correct |
1 ms |
544 KB |
Output is correct |
| 56 |
Correct |
1 ms |
512 KB |
Output is correct |
| 57 |
Correct |
2 ms |
640 KB |
Output is correct |
| 58 |
Correct |
1 ms |
512 KB |
Output is correct |
| 59 |
Correct |
1 ms |
512 KB |
Output is correct |
| 60 |
Correct |
1 ms |
512 KB |
Output is correct |
| 61 |
Correct |
1 ms |
512 KB |
Output is correct |
| 62 |
Correct |
1 ms |
640 KB |
Output is correct |
| 63 |
Correct |
1 ms |
512 KB |
Output is correct |
| 64 |
Correct |
207 ms |
15456 KB |
Output is correct |
| 65 |
Correct |
204 ms |
15324 KB |
Output is correct |
| 66 |
Correct |
208 ms |
15312 KB |
Output is correct |
| 67 |
Correct |
207 ms |
15324 KB |
Output is correct |
| 68 |
Correct |
206 ms |
15312 KB |
Output is correct |
| 69 |
Correct |
205 ms |
15320 KB |
Output is correct |
| 70 |
Correct |
199 ms |
15332 KB |
Output is correct |
| 71 |
Correct |
198 ms |
15328 KB |
Output is correct |
| 72 |
Correct |
204 ms |
15320 KB |
Output is correct |
| 73 |
Correct |
245 ms |
27840 KB |
Output is correct |
| 74 |
Correct |
250 ms |
27832 KB |
Output is correct |
| 75 |
Correct |
198 ms |
15196 KB |
Output is correct |
| 76 |
Correct |
194 ms |
15204 KB |
Output is correct |
| 77 |
Correct |
209 ms |
15192 KB |
Output is correct |
| 78 |
Correct |
220 ms |
15204 KB |
Output is correct |
| 79 |
Correct |
208 ms |
15204 KB |
Output is correct |
| 80 |
Correct |
216 ms |
15196 KB |
Output is correct |
| 81 |
Correct |
164 ms |
15604 KB |
Output is correct |
| 82 |
Correct |
186 ms |
15352 KB |
Output is correct |
| 83 |
Correct |
222 ms |
20284 KB |
Output is correct |
| 84 |
Correct |
222 ms |
22476 KB |
Output is correct |
| 85 |
Correct |
216 ms |
22084 KB |
Output is correct |
| 86 |
Correct |
211 ms |
16568 KB |
Output is correct |
| 87 |
Correct |
211 ms |
16112 KB |
Output is correct |
| 88 |
Correct |
190 ms |
16372 KB |
Output is correct |
| 89 |
Correct |
198 ms |
16584 KB |
Output is correct |
| 90 |
Correct |
185 ms |
16284 KB |
Output is correct |
| 91 |
Correct |
186 ms |
16616 KB |
Output is correct |
| 92 |
Correct |
191 ms |
16840 KB |
Output is correct |
| 93 |
Correct |
179 ms |
19204 KB |
Output is correct |
| 94 |
Correct |
186 ms |
20976 KB |
Output is correct |
| 95 |
Correct |
181 ms |
19568 KB |
Output is correct |
| 96 |
Correct |
185 ms |
17832 KB |
Output is correct |
| 97 |
Correct |
172 ms |
16404 KB |
Output is correct |
| 98 |
Correct |
173 ms |
15864 KB |
Output is correct |
| 99 |
Correct |
191 ms |
15704 KB |
Output is correct |
| 100 |
Correct |
182 ms |
18724 KB |
Output is correct |
| 101 |
Correct |
181 ms |
16692 KB |
Output is correct |
| 102 |
Correct |
187 ms |
16120 KB |
Output is correct |
| 103 |
Correct |
188 ms |
15852 KB |
Output is correct |
| 104 |
Correct |
104 ms |
16108 KB |
Output is correct |
| 105 |
Correct |
240 ms |
24760 KB |
Output is correct |
| 106 |
Correct |
103 ms |
16108 KB |
Output is correct |
| 107 |
Correct |
103 ms |
15980 KB |
Output is correct |
| 108 |
Correct |
238 ms |
28600 KB |
Output is correct |
| 109 |
Correct |
106 ms |
16108 KB |
Output is correct |
| 110 |
Correct |
237 ms |
28984 KB |
Output is correct |
| 111 |
Correct |
181 ms |
15204 KB |
Output is correct |
