#include <stdio.h>
#include <stdlib.h>
#define N 200000
int max(int a, int b) { return a > b ? a : b; }
char cc[N + 1];
int *ej[N], eo[N];
void append(int i, int j) {
int o = eo[i]++;
if (o >= 2 && (o & o - 1) == 0)
ej[i] = (int *) realloc(ej[i], o * 2 * sizeof *ej[i]);
ej[i][o] = j;
}
int dp[N], ans;
void dfs(int p, int i) {
int o;
dp[i] = cc[i] == '1' ? -1 : 0;
for (o = eo[i]; o--; ) {
int j = ej[i][o];
if (j != p) {
dfs(i, j);
dp[i] += dp[j];
}
}
dp[i] = max(dp[i], cc[i] == '1' ? 1 : 0);
ans = max(ans, dp[i] + (p != -1 && cc[p] == '1' ? 1 : 0));
}
int main() {
int n, h, i, j;
scanf("%d", &n);
for (i = 0; i < n; i++)
ej[i] = (int *) malloc(2 * sizeof *ej[i]);
for (h = 0; h < n - 1; h++) {
scanf("%d%d", &i, &j), i--, j--;
append(i, j), append(j, i);
}
scanf("%s", cc);
dfs(-1, 0);
printf("%d\n", ans);
return 0;
}
Compilation message
power.c: In function 'append':
power.c:14:23: warning: suggest parentheses around '-' in operand of '&' [-Wparentheses]
14 | if (o >= 2 && (o & o - 1) == 0)
| ~~^~~
power.c: In function 'main':
power.c:40:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
40 | scanf("%d", &n);
| ^~~~~~~~~~~~~~~
power.c:44:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
44 | scanf("%d%d", &i, &j), i--, j--;
| ^~~~~~~~~~~~~~~~~~~~~
power.c:47:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
47 | scanf("%s", cc);
| ^~~~~~~~~~~~~~~
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
292 KB |
Output is correct |
| 2 |
Correct |
1 ms |
212 KB |
Output is correct |
| 3 |
Correct |
0 ms |
292 KB |
Output is correct |
| 4 |
Correct |
1 ms |
212 KB |
Output is correct |
| 5 |
Correct |
1 ms |
292 KB |
Output is correct |
| 6 |
Correct |
1 ms |
212 KB |
Output is correct |
| 7 |
Correct |
1 ms |
296 KB |
Output is correct |
| 8 |
Correct |
0 ms |
212 KB |
Output is correct |
| 9 |
Correct |
1 ms |
212 KB |
Output is correct |
| 10 |
Correct |
1 ms |
212 KB |
Output is correct |
| 11 |
Correct |
1 ms |
212 KB |
Output is correct |
| 12 |
Correct |
1 ms |
212 KB |
Output is correct |
| 13 |
Correct |
1 ms |
292 KB |
Output is correct |
| 14 |
Correct |
1 ms |
340 KB |
Output is correct |
| 15 |
Correct |
0 ms |
212 KB |
Output is correct |
| 16 |
Correct |
1 ms |
296 KB |
Output is correct |
| 17 |
Correct |
0 ms |
212 KB |
Output is correct |
| 18 |
Correct |
1 ms |
212 KB |
Output is correct |
| 19 |
Correct |
1 ms |
212 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 |
1 ms |
292 KB |
Output is correct |
| 2 |
Correct |
1 ms |
212 KB |
Output is correct |
| 3 |
Correct |
0 ms |
292 KB |
Output is correct |
| 4 |
Correct |
1 ms |
212 KB |
Output is correct |
| 5 |
Correct |
1 ms |
292 KB |
Output is correct |
| 6 |
Correct |
1 ms |
212 KB |
Output is correct |
| 7 |
Correct |
1 ms |
296 KB |
Output is correct |
| 8 |
Correct |
0 ms |
212 KB |
Output is correct |
| 9 |
Correct |
1 ms |
212 KB |
Output is correct |
| 10 |
Correct |
1 ms |
212 KB |
Output is correct |
| 11 |
Correct |
1 ms |
212 KB |
Output is correct |
| 12 |
Correct |
1 ms |
212 KB |
Output is correct |
| 13 |
Correct |
1 ms |
292 KB |
Output is correct |
| 14 |
Correct |
1 ms |
340 KB |
Output is correct |
| 15 |
Correct |
0 ms |
212 KB |
Output is correct |
| 16 |
Correct |
1 ms |
296 KB |
Output is correct |
| 17 |
Correct |
0 ms |
212 KB |
Output is correct |
| 18 |
Correct |
1 ms |
212 KB |
Output is correct |
| 19 |
Correct |
1 ms |
212 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 |
340 KB |
Output is correct |
| 23 |
Correct |
1 ms |
300 KB |
Output is correct |
| 24 |
Correct |
1 ms |
340 KB |
Output is correct |
| 25 |
Correct |
1 ms |
340 KB |
Output is correct |
| 26 |
Correct |
1 ms |
340 KB |
Output is correct |
| 27 |
Correct |
1 ms |
340 KB |
Output is correct |
| 28 |
Correct |
2 ms |
340 KB |
Output is correct |
| 29 |
Correct |
1 ms |
468 KB |
Output is correct |
| 30 |
Correct |
1 ms |
432 KB |
Output is correct |
| 31 |
Correct |
1 ms |
340 KB |
Output is correct |
| 32 |
Correct |
1 ms |
340 KB |
Output is correct |
| 33 |
Correct |
2 ms |
304 KB |
Output is correct |
| 34 |
Correct |
1 ms |
340 KB |
Output is correct |
| 35 |
Correct |
1 ms |
340 KB |
Output is correct |
| 36 |
Correct |
2 ms |
340 KB |
Output is correct |
| 37 |
Correct |
1 ms |
428 KB |
Output is correct |
| 38 |
Correct |
1 ms |
340 KB |
Output is correct |
| 39 |
Correct |
1 ms |
428 KB |
Output is correct |
| 40 |
Correct |
1 ms |
340 KB |
Output is correct |
| 41 |
Correct |
1 ms |
468 KB |
Output is correct |
| 42 |
Correct |
1 ms |
340 KB |
Output is correct |
| 43 |
Correct |
1 ms |
408 KB |
Output is correct |
| 44 |
Correct |
1 ms |
412 KB |
Output is correct |
| 45 |
Correct |
2 ms |
340 KB |
Output is correct |
| 46 |
Correct |
1 ms |
432 KB |
Output is correct |
| 47 |
Correct |
2 ms |
412 KB |
Output is correct |
| 48 |
Correct |
1 ms |
428 KB |
Output is correct |
| 49 |
Correct |
1 ms |
468 KB |
Output is correct |
| 50 |
Correct |
1 ms |
428 KB |
Output is correct |
| 51 |
Correct |
1 ms |
432 KB |
Output is correct |
| 52 |
Correct |
1 ms |
340 KB |
Output is correct |
| 53 |
Correct |
1 ms |
432 KB |
Output is correct |
| 54 |
Correct |
1 ms |
340 KB |
Output is correct |
| 55 |
Correct |
1 ms |
340 KB |
Output is correct |
| 56 |
Correct |
1 ms |
340 KB |
Output is correct |
| 57 |
Correct |
1 ms |
468 KB |
Output is correct |
| 58 |
Correct |
2 ms |
340 KB |
Output is correct |
| 59 |
Correct |
2 ms |
420 KB |
Output is correct |
| 60 |
Correct |
2 ms |
468 KB |
Output is correct |
| 61 |
Correct |
2 ms |
432 KB |
Output is correct |
| 62 |
Correct |
1 ms |
468 KB |
Output is correct |
| 63 |
Correct |
1 ms |
340 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
292 KB |
Output is correct |
| 2 |
Correct |
1 ms |
212 KB |
Output is correct |
| 3 |
Correct |
0 ms |
292 KB |
Output is correct |
| 4 |
Correct |
1 ms |
212 KB |
Output is correct |
| 5 |
Correct |
1 ms |
292 KB |
Output is correct |
| 6 |
Correct |
1 ms |
212 KB |
Output is correct |
| 7 |
Correct |
1 ms |
296 KB |
Output is correct |
| 8 |
Correct |
0 ms |
212 KB |
Output is correct |
| 9 |
Correct |
1 ms |
212 KB |
Output is correct |
| 10 |
Correct |
1 ms |
212 KB |
Output is correct |
| 11 |
Correct |
1 ms |
212 KB |
Output is correct |
| 12 |
Correct |
1 ms |
212 KB |
Output is correct |
| 13 |
Correct |
1 ms |
292 KB |
Output is correct |
| 14 |
Correct |
1 ms |
340 KB |
Output is correct |
| 15 |
Correct |
0 ms |
212 KB |
Output is correct |
| 16 |
Correct |
1 ms |
296 KB |
Output is correct |
| 17 |
Correct |
0 ms |
212 KB |
Output is correct |
| 18 |
Correct |
1 ms |
212 KB |
Output is correct |
| 19 |
Correct |
1 ms |
212 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 |
340 KB |
Output is correct |
| 23 |
Correct |
1 ms |
300 KB |
Output is correct |
| 24 |
Correct |
1 ms |
340 KB |
Output is correct |
| 25 |
Correct |
1 ms |
340 KB |
Output is correct |
| 26 |
Correct |
1 ms |
340 KB |
Output is correct |
| 27 |
Correct |
1 ms |
340 KB |
Output is correct |
| 28 |
Correct |
2 ms |
340 KB |
Output is correct |
| 29 |
Correct |
1 ms |
468 KB |
Output is correct |
| 30 |
Correct |
1 ms |
432 KB |
Output is correct |
| 31 |
Correct |
1 ms |
340 KB |
Output is correct |
| 32 |
Correct |
1 ms |
340 KB |
Output is correct |
| 33 |
Correct |
2 ms |
304 KB |
Output is correct |
| 34 |
Correct |
1 ms |
340 KB |
Output is correct |
| 35 |
Correct |
1 ms |
340 KB |
Output is correct |
| 36 |
Correct |
2 ms |
340 KB |
Output is correct |
| 37 |
Correct |
1 ms |
428 KB |
Output is correct |
| 38 |
Correct |
1 ms |
340 KB |
Output is correct |
| 39 |
Correct |
1 ms |
428 KB |
Output is correct |
| 40 |
Correct |
1 ms |
340 KB |
Output is correct |
| 41 |
Correct |
1 ms |
468 KB |
Output is correct |
| 42 |
Correct |
1 ms |
340 KB |
Output is correct |
| 43 |
Correct |
1 ms |
408 KB |
Output is correct |
| 44 |
Correct |
1 ms |
412 KB |
Output is correct |
| 45 |
Correct |
2 ms |
340 KB |
Output is correct |
| 46 |
Correct |
1 ms |
432 KB |
Output is correct |
| 47 |
Correct |
2 ms |
412 KB |
Output is correct |
| 48 |
Correct |
1 ms |
428 KB |
Output is correct |
| 49 |
Correct |
1 ms |
468 KB |
Output is correct |
| 50 |
Correct |
1 ms |
428 KB |
Output is correct |
| 51 |
Correct |
1 ms |
432 KB |
Output is correct |
| 52 |
Correct |
1 ms |
340 KB |
Output is correct |
| 53 |
Correct |
1 ms |
432 KB |
Output is correct |
| 54 |
Correct |
1 ms |
340 KB |
Output is correct |
| 55 |
Correct |
1 ms |
340 KB |
Output is correct |
| 56 |
Correct |
1 ms |
340 KB |
Output is correct |
| 57 |
Correct |
1 ms |
468 KB |
Output is correct |
| 58 |
Correct |
2 ms |
340 KB |
Output is correct |
| 59 |
Correct |
2 ms |
420 KB |
Output is correct |
| 60 |
Correct |
2 ms |
468 KB |
Output is correct |
| 61 |
Correct |
2 ms |
432 KB |
Output is correct |
| 62 |
Correct |
1 ms |
468 KB |
Output is correct |
| 63 |
Correct |
1 ms |
340 KB |
Output is correct |
| 64 |
Correct |
158 ms |
12832 KB |
Output is correct |
| 65 |
Correct |
118 ms |
12852 KB |
Output is correct |
| 66 |
Correct |
142 ms |
12844 KB |
Output is correct |
| 67 |
Correct |
146 ms |
12844 KB |
Output is correct |
| 68 |
Correct |
117 ms |
12840 KB |
Output is correct |
| 69 |
Correct |
129 ms |
12832 KB |
Output is correct |
| 70 |
Correct |
140 ms |
12748 KB |
Output is correct |
| 71 |
Correct |
113 ms |
12844 KB |
Output is correct |
| 72 |
Correct |
136 ms |
12836 KB |
Output is correct |
| 73 |
Correct |
171 ms |
25380 KB |
Output is correct |
| 74 |
Correct |
135 ms |
25120 KB |
Output is correct |
| 75 |
Correct |
116 ms |
12564 KB |
Output is correct |
| 76 |
Correct |
105 ms |
12492 KB |
Output is correct |
| 77 |
Correct |
141 ms |
12460 KB |
Output is correct |
| 78 |
Correct |
130 ms |
12448 KB |
Output is correct |
| 79 |
Correct |
157 ms |
12580 KB |
Output is correct |
| 80 |
Correct |
130 ms |
12448 KB |
Output is correct |
| 81 |
Correct |
111 ms |
12884 KB |
Output is correct |
| 82 |
Correct |
135 ms |
12732 KB |
Output is correct |
| 83 |
Correct |
164 ms |
17856 KB |
Output is correct |
| 84 |
Correct |
139 ms |
19988 KB |
Output is correct |
| 85 |
Correct |
150 ms |
19648 KB |
Output is correct |
| 86 |
Correct |
130 ms |
14184 KB |
Output is correct |
| 87 |
Correct |
173 ms |
13620 KB |
Output is correct |
| 88 |
Correct |
119 ms |
14024 KB |
Output is correct |
| 89 |
Correct |
114 ms |
14000 KB |
Output is correct |
| 90 |
Correct |
142 ms |
13728 KB |
Output is correct |
| 91 |
Correct |
124 ms |
14028 KB |
Output is correct |
| 92 |
Correct |
114 ms |
14352 KB |
Output is correct |
| 93 |
Correct |
114 ms |
16572 KB |
Output is correct |
| 94 |
Correct |
112 ms |
18320 KB |
Output is correct |
| 95 |
Correct |
110 ms |
17224 KB |
Output is correct |
| 96 |
Correct |
113 ms |
15416 KB |
Output is correct |
| 97 |
Correct |
111 ms |
13884 KB |
Output is correct |
| 98 |
Correct |
107 ms |
13264 KB |
Output is correct |
| 99 |
Correct |
116 ms |
13476 KB |
Output is correct |
| 100 |
Correct |
100 ms |
16356 KB |
Output is correct |
| 101 |
Correct |
101 ms |
14272 KB |
Output is correct |
| 102 |
Correct |
112 ms |
13396 KB |
Output is correct |
| 103 |
Correct |
107 ms |
13464 KB |
Output is correct |
| 104 |
Correct |
84 ms |
13524 KB |
Output is correct |
| 105 |
Correct |
126 ms |
22092 KB |
Output is correct |
| 106 |
Correct |
91 ms |
13260 KB |
Output is correct |
| 107 |
Correct |
92 ms |
13356 KB |
Output is correct |
| 108 |
Correct |
163 ms |
25936 KB |
Output is correct |
| 109 |
Correct |
114 ms |
13532 KB |
Output is correct |
| 110 |
Correct |
160 ms |
26288 KB |
Output is correct |
| 111 |
Correct |
126 ms |
12464 KB |
Output is correct |
