#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define N 300000
#define N_ (1 << 19) /* N_ = pow2(ceil(log2(N + 1))) */
int pp[N + 1], *ej[N + 1], eo[N + 1]; long long xx[N + 1], yy[N + 1];
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 ta[N + 1], tb[N + 1];
void dfs1(int i) {
static int t_;
int o;
ta[i] = t_++;
for (o = eo[i]; o--; ) {
int j = ej[i][o];
dfs1(j);
}
tb[i] = t_;
}
int st[N_ * 2], n_;
int min_(int i, int j) { return j == -1 || i != -1 && xx[i] < xx[j] ? i : j; }
void pul(int i) {
st[i] = min_(st[i << 1 | 0], st[i << 1 | 1]);
}
void update(int i, int i_) {
st[i += n_] = i_;
while (i > 1)
pul(i >>= 1);
}
int query(int l, int r) {
int i_ = -1;
for (l += n_, r += n_; l <= r; l >>= 1, r >>= 1) {
if ((l & 1) == 1)
i_ = min_(i_, st[l++]);
if ((r & 1) == 0)
i_ = min_(i_, st[r--]);
}
return i_;
}
void dfs2(int i) {
int o;
for (o = eo[i]; o--; ) {
int j = ej[i][o];
dfs2(j);
}
if (yy[i] < 0)
xx[i] = -yy[i], yy[i] = 0;
while (1) {
int j = query(ta[i], tb[i]);
if (yy[i] <= xx[i]) {
if (j == -1)
break;
update(ta[j], -1);
if (yy[i] >= xx[j])
yy[i] += yy[j] - xx[j];
else
xx[i] += xx[j] - yy[i], yy[i] = yy[j];
} else {
if (j == -1 || yy[i] < xx[j]) {
update(ta[i], i);
break;
}
update(ta[j], -1);
yy[i] += yy[j] - xx[j];
}
}
}
int main() {
int n, i, j;
long long y;
scanf("%d%lld", &n, &y);
for (i = 0; i <= n; i++)
ej[i] = (int *) malloc(2 * sizeof *ej[i]);
yy[0] = y;
for (j = 1; j <= n; j++) {
scanf("%lld%d", &yy[j], &i);
append(i, j);
}
dfs1(0);
n_ = 1;
while (n_ <= n)
n_ <<= 1;
memset(st, -1, n_ * 2 * sizeof *st);
dfs2(0);
printf("%lld\n", yy[0] - y);
return 0;
}
Compilation message
Main.c: In function 'append':
Main.c:13:23: warning: suggest parentheses around '-' in operand of '&' [-Wparentheses]
13 | if (o >= 2 && (o & o - 1) == 0)
| ~~^~~
Main.c: In function 'min_':
Main.c:35:52: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
35 | int min_(int i, int j) { return j == -1 || i != -1 && xx[i] < xx[j] ? i : j; }
| ~~~~~~~~^~~~~~~~~~~~~~~~
Main.c: In function 'main':
Main.c:95:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
95 | scanf("%d%lld", &n, &y);
| ^~~~~~~~~~~~~~~~~~~~~~~
Main.c:100:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
100 | scanf("%lld%d", &yy[j], &i);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
161 ms |
28244 KB |
Output is correct |
2 |
Correct |
164 ms |
29008 KB |
Output is correct |
3 |
Correct |
163 ms |
28500 KB |
Output is correct |
4 |
Correct |
127 ms |
36704 KB |
Output is correct |
5 |
Correct |
131 ms |
40072 KB |
Output is correct |
6 |
Correct |
124 ms |
18008 KB |
Output is correct |
7 |
Correct |
157 ms |
29036 KB |
Output is correct |
8 |
Correct |
171 ms |
29264 KB |
Output is correct |
9 |
Correct |
143 ms |
37716 KB |
Output is correct |
10 |
Correct |
142 ms |
39852 KB |
Output is correct |
11 |
Correct |
170 ms |
29268 KB |
Output is correct |
12 |
Correct |
134 ms |
23120 KB |
Output is correct |
13 |
Correct |
176 ms |
29392 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
348 KB |
Output is correct |
2 |
Correct |
0 ms |
348 KB |
Output is correct |
3 |
Correct |
1 ms |
348 KB |
Output is correct |
4 |
Correct |
1 ms |
604 KB |
Output is correct |
5 |
Correct |
1 ms |
604 KB |
Output is correct |
6 |
Correct |
2 ms |
604 KB |
Output is correct |
7 |
Correct |
2 ms |
604 KB |
Output is correct |
8 |
Correct |
1 ms |
604 KB |
Output is correct |
9 |
Correct |
1 ms |
604 KB |
Output is correct |
10 |
Correct |
1 ms |
604 KB |
Output is correct |
11 |
Correct |
1 ms |
572 KB |
Output is correct |
12 |
Correct |
1 ms |
700 KB |
Output is correct |
13 |
Correct |
2 ms |
580 KB |
Output is correct |
14 |
Correct |
1 ms |
604 KB |
Output is correct |
15 |
Correct |
1 ms |
604 KB |
Output is correct |
16 |
Correct |
1 ms |
604 KB |
Output is correct |
17 |
Correct |
2 ms |
604 KB |
Output is correct |
18 |
Correct |
1 ms |
568 KB |
Output is correct |
19 |
Correct |
1 ms |
600 KB |
Output is correct |
20 |
Correct |
1 ms |
604 KB |
Output is correct |
21 |
Correct |
1 ms |
604 KB |
Output is correct |
22 |
Correct |
1 ms |
604 KB |
Output is correct |
23 |
Correct |
1 ms |
616 KB |
Output is correct |
24 |
Correct |
2 ms |
604 KB |
Output is correct |
25 |
Correct |
1 ms |
852 KB |
Output is correct |
26 |
Correct |
2 ms |
600 KB |
Output is correct |
27 |
Correct |
1 ms |
604 KB |
Output is correct |
28 |
Correct |
1 ms |
604 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
348 KB |
Output is correct |
2 |
Correct |
0 ms |
348 KB |
Output is correct |
3 |
Correct |
1 ms |
348 KB |
Output is correct |
4 |
Correct |
1 ms |
604 KB |
Output is correct |
5 |
Correct |
1 ms |
604 KB |
Output is correct |
6 |
Correct |
2 ms |
604 KB |
Output is correct |
7 |
Correct |
2 ms |
604 KB |
Output is correct |
8 |
Correct |
1 ms |
604 KB |
Output is correct |
9 |
Correct |
1 ms |
604 KB |
Output is correct |
10 |
Correct |
1 ms |
604 KB |
Output is correct |
11 |
Correct |
1 ms |
572 KB |
Output is correct |
12 |
Correct |
1 ms |
700 KB |
Output is correct |
13 |
Correct |
2 ms |
580 KB |
Output is correct |
14 |
Correct |
1 ms |
604 KB |
Output is correct |
15 |
Correct |
1 ms |
604 KB |
Output is correct |
16 |
Correct |
1 ms |
604 KB |
Output is correct |
17 |
Correct |
2 ms |
604 KB |
Output is correct |
18 |
Correct |
1 ms |
568 KB |
Output is correct |
19 |
Correct |
1 ms |
600 KB |
Output is correct |
20 |
Correct |
1 ms |
604 KB |
Output is correct |
21 |
Correct |
1 ms |
604 KB |
Output is correct |
22 |
Correct |
1 ms |
604 KB |
Output is correct |
23 |
Correct |
1 ms |
616 KB |
Output is correct |
24 |
Correct |
2 ms |
604 KB |
Output is correct |
25 |
Correct |
1 ms |
852 KB |
Output is correct |
26 |
Correct |
2 ms |
600 KB |
Output is correct |
27 |
Correct |
1 ms |
604 KB |
Output is correct |
28 |
Correct |
1 ms |
604 KB |
Output is correct |
29 |
Correct |
129 ms |
28240 KB |
Output is correct |
30 |
Correct |
136 ms |
28368 KB |
Output is correct |
31 |
Correct |
148 ms |
28184 KB |
Output is correct |
32 |
Correct |
146 ms |
51800 KB |
Output is correct |
33 |
Correct |
157 ms |
40272 KB |
Output is correct |
34 |
Correct |
169 ms |
36176 KB |
Output is correct |
35 |
Correct |
73 ms |
15132 KB |
Output is correct |
36 |
Correct |
135 ms |
33448 KB |
Output is correct |
37 |
Correct |
145 ms |
29344 KB |
Output is correct |
38 |
Correct |
149 ms |
51824 KB |
Output is correct |
39 |
Correct |
144 ms |
41924 KB |
Output is correct |
40 |
Correct |
138 ms |
32920 KB |
Output is correct |
41 |
Correct |
122 ms |
29008 KB |
Output is correct |
42 |
Correct |
52 ms |
18516 KB |
Output is correct |
43 |
Correct |
123 ms |
36176 KB |
Output is correct |
44 |
Correct |
140 ms |
52040 KB |
Output is correct |
45 |
Correct |
142 ms |
42064 KB |
Output is correct |
46 |
Correct |
133 ms |
36180 KB |
Output is correct |
47 |
Correct |
131 ms |
28940 KB |
Output is correct |
48 |
Correct |
117 ms |
29268 KB |
Output is correct |
49 |
Correct |
130 ms |
28920 KB |
Output is correct |
50 |
Correct |
145 ms |
52052 KB |
Output is correct |
51 |
Correct |
98 ms |
30600 KB |
Output is correct |
52 |
Correct |
129 ms |
32340 KB |
Output is correct |
53 |
Correct |
94 ms |
25684 KB |
Output is correct |
54 |
Correct |
118 ms |
28452 KB |
Output is correct |
55 |
Correct |
122 ms |
29008 KB |
Output is correct |
56 |
Correct |
143 ms |
52020 KB |
Output is correct |
57 |
Correct |
148 ms |
40276 KB |
Output is correct |
58 |
Correct |
131 ms |
32336 KB |
Output is correct |
59 |
Correct |
139 ms |
32568 KB |
Output is correct |
60 |
Correct |
96 ms |
28460 KB |
Output is correct |
61 |
Correct |
126 ms |
35764 KB |
Output is correct |
62 |
Correct |
164 ms |
34160 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
348 KB |
Output is correct |
2 |
Correct |
0 ms |
348 KB |
Output is correct |
3 |
Correct |
1 ms |
348 KB |
Output is correct |
4 |
Correct |
1 ms |
604 KB |
Output is correct |
5 |
Correct |
1 ms |
604 KB |
Output is correct |
6 |
Correct |
2 ms |
604 KB |
Output is correct |
7 |
Correct |
2 ms |
604 KB |
Output is correct |
8 |
Correct |
1 ms |
604 KB |
Output is correct |
9 |
Correct |
1 ms |
604 KB |
Output is correct |
10 |
Correct |
1 ms |
604 KB |
Output is correct |
11 |
Correct |
1 ms |
572 KB |
Output is correct |
12 |
Correct |
1 ms |
700 KB |
Output is correct |
13 |
Correct |
2 ms |
580 KB |
Output is correct |
14 |
Correct |
1 ms |
604 KB |
Output is correct |
15 |
Correct |
1 ms |
604 KB |
Output is correct |
16 |
Correct |
1 ms |
604 KB |
Output is correct |
17 |
Correct |
2 ms |
604 KB |
Output is correct |
18 |
Correct |
1 ms |
568 KB |
Output is correct |
19 |
Correct |
1 ms |
600 KB |
Output is correct |
20 |
Correct |
1 ms |
604 KB |
Output is correct |
21 |
Correct |
1 ms |
604 KB |
Output is correct |
22 |
Correct |
1 ms |
604 KB |
Output is correct |
23 |
Correct |
1 ms |
616 KB |
Output is correct |
24 |
Correct |
2 ms |
604 KB |
Output is correct |
25 |
Correct |
1 ms |
852 KB |
Output is correct |
26 |
Correct |
2 ms |
600 KB |
Output is correct |
27 |
Correct |
1 ms |
604 KB |
Output is correct |
28 |
Correct |
1 ms |
604 KB |
Output is correct |
29 |
Correct |
1 ms |
344 KB |
Output is correct |
30 |
Correct |
1 ms |
604 KB |
Output is correct |
31 |
Correct |
1 ms |
604 KB |
Output is correct |
32 |
Correct |
1 ms |
604 KB |
Output is correct |
33 |
Correct |
1 ms |
604 KB |
Output is correct |
34 |
Correct |
1 ms |
604 KB |
Output is correct |
35 |
Correct |
1 ms |
604 KB |
Output is correct |
36 |
Correct |
1 ms |
604 KB |
Output is correct |
37 |
Correct |
1 ms |
604 KB |
Output is correct |
38 |
Correct |
1 ms |
604 KB |
Output is correct |
39 |
Correct |
1 ms |
604 KB |
Output is correct |
40 |
Correct |
1 ms |
600 KB |
Output is correct |
41 |
Correct |
1 ms |
604 KB |
Output is correct |
42 |
Correct |
1 ms |
604 KB |
Output is correct |
43 |
Correct |
1 ms |
604 KB |
Output is correct |
44 |
Correct |
1 ms |
604 KB |
Output is correct |
45 |
Correct |
1 ms |
604 KB |
Output is correct |
46 |
Correct |
1 ms |
604 KB |
Output is correct |
47 |
Correct |
1 ms |
696 KB |
Output is correct |
48 |
Correct |
1 ms |
604 KB |
Output is correct |
49 |
Correct |
1 ms |
604 KB |
Output is correct |
50 |
Correct |
1 ms |
604 KB |
Output is correct |
51 |
Correct |
1 ms |
604 KB |
Output is correct |
52 |
Correct |
1 ms |
600 KB |
Output is correct |
53 |
Correct |
1 ms |
600 KB |
Output is correct |
54 |
Correct |
1 ms |
604 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
161 ms |
28244 KB |
Output is correct |
2 |
Correct |
164 ms |
29008 KB |
Output is correct |
3 |
Correct |
163 ms |
28500 KB |
Output is correct |
4 |
Correct |
127 ms |
36704 KB |
Output is correct |
5 |
Correct |
131 ms |
40072 KB |
Output is correct |
6 |
Correct |
124 ms |
18008 KB |
Output is correct |
7 |
Correct |
157 ms |
29036 KB |
Output is correct |
8 |
Correct |
171 ms |
29264 KB |
Output is correct |
9 |
Correct |
143 ms |
37716 KB |
Output is correct |
10 |
Correct |
142 ms |
39852 KB |
Output is correct |
11 |
Correct |
170 ms |
29268 KB |
Output is correct |
12 |
Correct |
134 ms |
23120 KB |
Output is correct |
13 |
Correct |
176 ms |
29392 KB |
Output is correct |
14 |
Correct |
0 ms |
348 KB |
Output is correct |
15 |
Correct |
0 ms |
348 KB |
Output is correct |
16 |
Correct |
1 ms |
348 KB |
Output is correct |
17 |
Correct |
1 ms |
604 KB |
Output is correct |
18 |
Correct |
1 ms |
604 KB |
Output is correct |
19 |
Correct |
2 ms |
604 KB |
Output is correct |
20 |
Correct |
2 ms |
604 KB |
Output is correct |
21 |
Correct |
1 ms |
604 KB |
Output is correct |
22 |
Correct |
1 ms |
604 KB |
Output is correct |
23 |
Correct |
1 ms |
604 KB |
Output is correct |
24 |
Correct |
1 ms |
572 KB |
Output is correct |
25 |
Correct |
1 ms |
700 KB |
Output is correct |
26 |
Correct |
2 ms |
580 KB |
Output is correct |
27 |
Correct |
1 ms |
604 KB |
Output is correct |
28 |
Correct |
1 ms |
604 KB |
Output is correct |
29 |
Correct |
1 ms |
604 KB |
Output is correct |
30 |
Correct |
2 ms |
604 KB |
Output is correct |
31 |
Correct |
1 ms |
568 KB |
Output is correct |
32 |
Correct |
1 ms |
600 KB |
Output is correct |
33 |
Correct |
1 ms |
604 KB |
Output is correct |
34 |
Correct |
1 ms |
604 KB |
Output is correct |
35 |
Correct |
1 ms |
604 KB |
Output is correct |
36 |
Correct |
1 ms |
616 KB |
Output is correct |
37 |
Correct |
2 ms |
604 KB |
Output is correct |
38 |
Correct |
1 ms |
852 KB |
Output is correct |
39 |
Correct |
2 ms |
600 KB |
Output is correct |
40 |
Correct |
1 ms |
604 KB |
Output is correct |
41 |
Correct |
1 ms |
604 KB |
Output is correct |
42 |
Correct |
129 ms |
28240 KB |
Output is correct |
43 |
Correct |
136 ms |
28368 KB |
Output is correct |
44 |
Correct |
148 ms |
28184 KB |
Output is correct |
45 |
Correct |
146 ms |
51800 KB |
Output is correct |
46 |
Correct |
157 ms |
40272 KB |
Output is correct |
47 |
Correct |
169 ms |
36176 KB |
Output is correct |
48 |
Correct |
73 ms |
15132 KB |
Output is correct |
49 |
Correct |
135 ms |
33448 KB |
Output is correct |
50 |
Correct |
145 ms |
29344 KB |
Output is correct |
51 |
Correct |
149 ms |
51824 KB |
Output is correct |
52 |
Correct |
144 ms |
41924 KB |
Output is correct |
53 |
Correct |
138 ms |
32920 KB |
Output is correct |
54 |
Correct |
122 ms |
29008 KB |
Output is correct |
55 |
Correct |
52 ms |
18516 KB |
Output is correct |
56 |
Correct |
123 ms |
36176 KB |
Output is correct |
57 |
Correct |
140 ms |
52040 KB |
Output is correct |
58 |
Correct |
142 ms |
42064 KB |
Output is correct |
59 |
Correct |
133 ms |
36180 KB |
Output is correct |
60 |
Correct |
131 ms |
28940 KB |
Output is correct |
61 |
Correct |
117 ms |
29268 KB |
Output is correct |
62 |
Correct |
130 ms |
28920 KB |
Output is correct |
63 |
Correct |
145 ms |
52052 KB |
Output is correct |
64 |
Correct |
98 ms |
30600 KB |
Output is correct |
65 |
Correct |
129 ms |
32340 KB |
Output is correct |
66 |
Correct |
94 ms |
25684 KB |
Output is correct |
67 |
Correct |
118 ms |
28452 KB |
Output is correct |
68 |
Correct |
122 ms |
29008 KB |
Output is correct |
69 |
Correct |
143 ms |
52020 KB |
Output is correct |
70 |
Correct |
148 ms |
40276 KB |
Output is correct |
71 |
Correct |
131 ms |
32336 KB |
Output is correct |
72 |
Correct |
139 ms |
32568 KB |
Output is correct |
73 |
Correct |
96 ms |
28460 KB |
Output is correct |
74 |
Correct |
126 ms |
35764 KB |
Output is correct |
75 |
Correct |
164 ms |
34160 KB |
Output is correct |
76 |
Correct |
1 ms |
344 KB |
Output is correct |
77 |
Correct |
1 ms |
604 KB |
Output is correct |
78 |
Correct |
1 ms |
604 KB |
Output is correct |
79 |
Correct |
1 ms |
604 KB |
Output is correct |
80 |
Correct |
1 ms |
604 KB |
Output is correct |
81 |
Correct |
1 ms |
604 KB |
Output is correct |
82 |
Correct |
1 ms |
604 KB |
Output is correct |
83 |
Correct |
1 ms |
604 KB |
Output is correct |
84 |
Correct |
1 ms |
604 KB |
Output is correct |
85 |
Correct |
1 ms |
604 KB |
Output is correct |
86 |
Correct |
1 ms |
604 KB |
Output is correct |
87 |
Correct |
1 ms |
600 KB |
Output is correct |
88 |
Correct |
1 ms |
604 KB |
Output is correct |
89 |
Correct |
1 ms |
604 KB |
Output is correct |
90 |
Correct |
1 ms |
604 KB |
Output is correct |
91 |
Correct |
1 ms |
604 KB |
Output is correct |
92 |
Correct |
1 ms |
604 KB |
Output is correct |
93 |
Correct |
1 ms |
604 KB |
Output is correct |
94 |
Correct |
1 ms |
696 KB |
Output is correct |
95 |
Correct |
1 ms |
604 KB |
Output is correct |
96 |
Correct |
1 ms |
604 KB |
Output is correct |
97 |
Correct |
1 ms |
604 KB |
Output is correct |
98 |
Correct |
1 ms |
604 KB |
Output is correct |
99 |
Correct |
1 ms |
600 KB |
Output is correct |
100 |
Correct |
1 ms |
600 KB |
Output is correct |
101 |
Correct |
1 ms |
604 KB |
Output is correct |
102 |
Correct |
165 ms |
28956 KB |
Output is correct |
103 |
Correct |
201 ms |
29012 KB |
Output is correct |
104 |
Correct |
144 ms |
28976 KB |
Output is correct |
105 |
Correct |
121 ms |
29088 KB |
Output is correct |
106 |
Correct |
131 ms |
40072 KB |
Output is correct |
107 |
Correct |
133 ms |
36388 KB |
Output is correct |
108 |
Correct |
168 ms |
28896 KB |
Output is correct |
109 |
Correct |
86 ms |
14932 KB |
Output is correct |
110 |
Correct |
152 ms |
29012 KB |
Output is correct |
111 |
Correct |
151 ms |
29012 KB |
Output is correct |
112 |
Correct |
145 ms |
29552 KB |
Output is correct |
113 |
Correct |
125 ms |
36176 KB |
Output is correct |
114 |
Correct |
142 ms |
41040 KB |
Output is correct |
115 |
Correct |
77 ms |
14832 KB |
Output is correct |
116 |
Correct |
168 ms |
29008 KB |
Output is correct |
117 |
Correct |
135 ms |
28756 KB |
Output is correct |
118 |
Correct |
164 ms |
29700 KB |
Output is correct |
119 |
Correct |
138 ms |
28496 KB |
Output is correct |
120 |
Correct |
125 ms |
36688 KB |
Output is correct |
121 |
Correct |
143 ms |
36556 KB |
Output is correct |
122 |
Correct |
154 ms |
29008 KB |
Output is correct |
123 |
Correct |
192 ms |
29308 KB |
Output is correct |
124 |
Correct |
134 ms |
29008 KB |
Output is correct |
125 |
Correct |
181 ms |
30184 KB |
Output is correct |
126 |
Correct |
139 ms |
29288 KB |
Output is correct |
127 |
Correct |
71 ms |
20564 KB |
Output is correct |
128 |
Correct |
52 ms |
17464 KB |
Output is correct |
129 |
Correct |
194 ms |
28564 KB |
Output is correct |
130 |
Correct |
156 ms |
28804 KB |
Output is correct |
131 |
Correct |
144 ms |
29268 KB |
Output is correct |
132 |
Correct |
151 ms |
28804 KB |
Output is correct |
133 |
Correct |
159 ms |
28500 KB |
Output is correct |
134 |
Correct |
127 ms |
40272 KB |
Output is correct |
135 |
Correct |
131 ms |
38484 KB |
Output is correct |
136 |
Correct |
187 ms |
29388 KB |
Output is correct |
137 |
Correct |
165 ms |
29008 KB |
Output is correct |