/**
* author: NimaAryan
* created: 2023-12-09 09:11:54
**/
#include <bits/stdc++.h>
using namespace std;
#ifdef LOCAL
#include "algo/debug.h"
#endif
using i64 = long long;
struct Tag {
i64 add = 0;
void apply(Tag v) {
add += v.add;
}
};
struct Info {
i64 min_dep = 0;
i64 max_dep = 0;
/* max(dep[x] - 2 * dep[y]) */
i64 limp = 0;
i64 rimp = 0;
i64 diam = 0;
void apply(Tag v) {
min_dep += v.add;
max_dep += v.add;
limp -= v.add;
rimp -= v.add;
}
};
Info operator+(Info a, Info b) {
Info res;
res.min_dep = min(a.min_dep, b.min_dep);
res.max_dep = max(a.max_dep, b.max_dep);
res.limp = max({a.limp, b.limp, a.max_dep - 2LL * b.min_dep});
res.rimp = max({a.rimp, b.rimp, b.max_dep - 2LL * a.min_dep});
res.diam = max({a.diam, b.diam, a.max_dep + b.rimp, b.max_dep + a.limp});
return res;
}
class LazySegmentTree {
public:
vector<Info> info;
vector<Tag> tag;
int n;
LazySegmentTree(int n) : n(n) {
info.assign(4 << __lg(n), Info());
tag.assign(4 << __lg(n), Tag());
}
void pull(int p) {
info[p] = info[2 * p] + info[2 * p + 1];
}
void apply(int p, const Tag& v) {
info[p].apply(v);
tag[p].apply(v);
}
void push(int p) {
apply(2 * p, tag[p]);
apply(2 * p + 1, tag[p]);
tag[p] = Tag();
}
void range_apply(int p, int l, int r, int lx, int rx,
const Tag& v) {
if (l >= rx || r <= lx) {
return;
}
if (l >= lx && r <= rx) {
apply(p, v);
return;
}
int m = (l + r) / 2;
push(p);
range_apply(2 * p, l, m, lx, rx, v);
range_apply(2 * p + 1, m, r, lx, rx, v);
pull(p);
}
void range_apply(int lx, int rx, const Tag& v) {
range_apply(1, 0, n, lx, rx, v);
}
};
int main() {
ios::sync_with_stdio(false);
cin.tie(nullptr);
int n, q;
cin >> n >> q;
i64 w;
cin >> w;
vector<vector<pair<int, i64>>> t(n);
vector<i64> c(n - 1);
for (int i = 0; i < n - 1; ++i) {
int a, b;
cin >> a >> b;
--a, --b;
cin >> c[i];
t[a].emplace_back(b, i);
t[b].emplace_back(a, i);
}
LazySegmentTree seg(2 * n - 1);
vector<int> tin(n - 1), tout(n - 1);
int num = 0;
auto dfs = [&](auto self, int x, int p) -> void {
num++;
for (auto [y, i] : t[x]) {
if (i != p) {
tin[i] = num;
self(self, y, i);
tout[i] = num;
seg.range_apply(tin[i], tout[i], Tag{c[i]});
num++;
}
}
};
dfs(dfs, 0, -1);
i64 last = 0;
while (q--) {
int d;
cin >> d;
i64 e;
cin >> e;
d = (d + last) % (n - 1);
e = (e + last) % w;
seg.range_apply(tin[d], tout[d], Tag{-c[d]});
c[d] = e;
seg.range_apply(tin[d], tout[d], Tag{+c[d]});
cout << (last = seg.info[1].diam) << "\n";
}
return 0;
}
# |
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 |
0 ms |
344 KB |
Output is correct |
5 |
Correct |
0 ms |
348 KB |
Output is correct |
6 |
Correct |
1 ms |
348 KB |
Output is correct |
7 |
Correct |
1 ms |
348 KB |
Output is correct |
8 |
Correct |
0 ms |
348 KB |
Output is correct |
9 |
Correct |
1 ms |
500 KB |
Output is correct |
10 |
Correct |
0 ms |
348 KB |
Output is correct |
11 |
Correct |
0 ms |
348 KB |
Output is correct |
12 |
Correct |
1 ms |
348 KB |
Output is correct |
13 |
Correct |
0 ms |
348 KB |
Output is correct |
14 |
Correct |
1 ms |
348 KB |
Output is correct |
15 |
Correct |
1 ms |
348 KB |
Output is correct |
16 |
Correct |
0 ms |
348 KB |
Output is correct |
17 |
Correct |
1 ms |
348 KB |
Output is correct |
18 |
Correct |
1 ms |
348 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 |
0 ms |
344 KB |
Output is correct |
5 |
Correct |
0 ms |
348 KB |
Output is correct |
6 |
Correct |
1 ms |
348 KB |
Output is correct |
7 |
Correct |
1 ms |
348 KB |
Output is correct |
8 |
Correct |
0 ms |
348 KB |
Output is correct |
9 |
Correct |
1 ms |
500 KB |
Output is correct |
10 |
Correct |
0 ms |
348 KB |
Output is correct |
11 |
Correct |
0 ms |
348 KB |
Output is correct |
12 |
Correct |
1 ms |
348 KB |
Output is correct |
13 |
Correct |
0 ms |
348 KB |
Output is correct |
14 |
Correct |
1 ms |
348 KB |
Output is correct |
15 |
Correct |
1 ms |
348 KB |
Output is correct |
16 |
Correct |
0 ms |
348 KB |
Output is correct |
17 |
Correct |
1 ms |
348 KB |
Output is correct |
18 |
Correct |
1 ms |
348 KB |
Output is correct |
19 |
Correct |
5 ms |
600 KB |
Output is correct |
20 |
Correct |
5 ms |
856 KB |
Output is correct |
21 |
Correct |
6 ms |
696 KB |
Output is correct |
22 |
Correct |
6 ms |
888 KB |
Output is correct |
23 |
Correct |
9 ms |
2396 KB |
Output is correct |
24 |
Correct |
10 ms |
2512 KB |
Output is correct |
25 |
Correct |
10 ms |
2652 KB |
Output is correct |
26 |
Correct |
13 ms |
2956 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 |
9 ms |
604 KB |
Output is correct |
5 |
Correct |
43 ms |
1364 KB |
Output is correct |
6 |
Correct |
0 ms |
348 KB |
Output is correct |
7 |
Correct |
1 ms |
604 KB |
Output is correct |
8 |
Correct |
1 ms |
604 KB |
Output is correct |
9 |
Correct |
2 ms |
604 KB |
Output is correct |
10 |
Correct |
14 ms |
796 KB |
Output is correct |
11 |
Correct |
66 ms |
1924 KB |
Output is correct |
12 |
Correct |
4 ms |
2652 KB |
Output is correct |
13 |
Correct |
5 ms |
2392 KB |
Output is correct |
14 |
Correct |
5 ms |
2464 KB |
Output is correct |
15 |
Correct |
21 ms |
2712 KB |
Output is correct |
16 |
Correct |
93 ms |
4176 KB |
Output is correct |
17 |
Correct |
73 ms |
34752 KB |
Output is correct |
18 |
Correct |
70 ms |
34904 KB |
Output is correct |
19 |
Correct |
73 ms |
34764 KB |
Output is correct |
20 |
Correct |
93 ms |
35012 KB |
Output is correct |
21 |
Correct |
203 ms |
36544 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
2 ms |
604 KB |
Output is correct |
2 |
Correct |
10 ms |
860 KB |
Output is correct |
3 |
Correct |
50 ms |
1400 KB |
Output is correct |
4 |
Correct |
95 ms |
2128 KB |
Output is correct |
5 |
Correct |
10 ms |
4444 KB |
Output is correct |
6 |
Correct |
20 ms |
4700 KB |
Output is correct |
7 |
Correct |
72 ms |
5392 KB |
Output is correct |
8 |
Correct |
130 ms |
5972 KB |
Output is correct |
9 |
Correct |
43 ms |
18268 KB |
Output is correct |
10 |
Correct |
53 ms |
18400 KB |
Output is correct |
11 |
Correct |
113 ms |
19016 KB |
Output is correct |
12 |
Correct |
185 ms |
19712 KB |
Output is correct |
13 |
Correct |
80 ms |
35896 KB |
Output is correct |
14 |
Correct |
96 ms |
36168 KB |
Output is correct |
15 |
Correct |
161 ms |
36692 KB |
Output is correct |
16 |
Correct |
242 ms |
37536 KB |
Output is correct |
17 |
Correct |
213 ms |
37460 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
276 ms |
39992 KB |
Output is correct |
2 |
Correct |
263 ms |
39760 KB |
Output is correct |
3 |
Correct |
267 ms |
39860 KB |
Output is correct |
4 |
Correct |
254 ms |
39764 KB |
Output is correct |
5 |
Correct |
257 ms |
39640 KB |
Output is correct |
6 |
Correct |
270 ms |
39544 KB |
Output is correct |
7 |
Correct |
309 ms |
42384 KB |
Output is correct |
8 |
Correct |
342 ms |
42424 KB |
Output is correct |
9 |
Correct |
296 ms |
42396 KB |
Output is correct |
10 |
Correct |
325 ms |
42428 KB |
Output is correct |
11 |
Correct |
359 ms |
42188 KB |
Output is correct |
12 |
Correct |
288 ms |
41536 KB |
Output is correct |
13 |
Correct |
401 ms |
46420 KB |
Output is correct |
14 |
Correct |
393 ms |
46416 KB |
Output is correct |
15 |
Correct |
390 ms |
46256 KB |
Output is correct |
16 |
Correct |
375 ms |
46420 KB |
Output is correct |
17 |
Correct |
382 ms |
46056 KB |
Output is correct |
18 |
Correct |
328 ms |
42696 KB |
Output is correct |
19 |
Correct |
390 ms |
46244 KB |
Output is correct |
20 |
Correct |
365 ms |
46168 KB |
Output is correct |
21 |
Correct |
417 ms |
46596 KB |
Output is correct |
22 |
Correct |
382 ms |
46440 KB |
Output is correct |
23 |
Correct |
383 ms |
45668 KB |
Output is correct |
24 |
Correct |
316 ms |
42724 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 |
0 ms |
344 KB |
Output is correct |
5 |
Correct |
0 ms |
348 KB |
Output is correct |
6 |
Correct |
1 ms |
348 KB |
Output is correct |
7 |
Correct |
1 ms |
348 KB |
Output is correct |
8 |
Correct |
0 ms |
348 KB |
Output is correct |
9 |
Correct |
1 ms |
500 KB |
Output is correct |
10 |
Correct |
0 ms |
348 KB |
Output is correct |
11 |
Correct |
0 ms |
348 KB |
Output is correct |
12 |
Correct |
1 ms |
348 KB |
Output is correct |
13 |
Correct |
0 ms |
348 KB |
Output is correct |
14 |
Correct |
1 ms |
348 KB |
Output is correct |
15 |
Correct |
1 ms |
348 KB |
Output is correct |
16 |
Correct |
0 ms |
348 KB |
Output is correct |
17 |
Correct |
1 ms |
348 KB |
Output is correct |
18 |
Correct |
1 ms |
348 KB |
Output is correct |
19 |
Correct |
5 ms |
600 KB |
Output is correct |
20 |
Correct |
5 ms |
856 KB |
Output is correct |
21 |
Correct |
6 ms |
696 KB |
Output is correct |
22 |
Correct |
6 ms |
888 KB |
Output is correct |
23 |
Correct |
9 ms |
2396 KB |
Output is correct |
24 |
Correct |
10 ms |
2512 KB |
Output is correct |
25 |
Correct |
10 ms |
2652 KB |
Output is correct |
26 |
Correct |
13 ms |
2956 KB |
Output is correct |
27 |
Correct |
0 ms |
348 KB |
Output is correct |
28 |
Correct |
0 ms |
348 KB |
Output is correct |
29 |
Correct |
1 ms |
348 KB |
Output is correct |
30 |
Correct |
9 ms |
604 KB |
Output is correct |
31 |
Correct |
43 ms |
1364 KB |
Output is correct |
32 |
Correct |
0 ms |
348 KB |
Output is correct |
33 |
Correct |
1 ms |
604 KB |
Output is correct |
34 |
Correct |
1 ms |
604 KB |
Output is correct |
35 |
Correct |
2 ms |
604 KB |
Output is correct |
36 |
Correct |
14 ms |
796 KB |
Output is correct |
37 |
Correct |
66 ms |
1924 KB |
Output is correct |
38 |
Correct |
4 ms |
2652 KB |
Output is correct |
39 |
Correct |
5 ms |
2392 KB |
Output is correct |
40 |
Correct |
5 ms |
2464 KB |
Output is correct |
41 |
Correct |
21 ms |
2712 KB |
Output is correct |
42 |
Correct |
93 ms |
4176 KB |
Output is correct |
43 |
Correct |
73 ms |
34752 KB |
Output is correct |
44 |
Correct |
70 ms |
34904 KB |
Output is correct |
45 |
Correct |
73 ms |
34764 KB |
Output is correct |
46 |
Correct |
93 ms |
35012 KB |
Output is correct |
47 |
Correct |
203 ms |
36544 KB |
Output is correct |
48 |
Correct |
2 ms |
604 KB |
Output is correct |
49 |
Correct |
10 ms |
860 KB |
Output is correct |
50 |
Correct |
50 ms |
1400 KB |
Output is correct |
51 |
Correct |
95 ms |
2128 KB |
Output is correct |
52 |
Correct |
10 ms |
4444 KB |
Output is correct |
53 |
Correct |
20 ms |
4700 KB |
Output is correct |
54 |
Correct |
72 ms |
5392 KB |
Output is correct |
55 |
Correct |
130 ms |
5972 KB |
Output is correct |
56 |
Correct |
43 ms |
18268 KB |
Output is correct |
57 |
Correct |
53 ms |
18400 KB |
Output is correct |
58 |
Correct |
113 ms |
19016 KB |
Output is correct |
59 |
Correct |
185 ms |
19712 KB |
Output is correct |
60 |
Correct |
80 ms |
35896 KB |
Output is correct |
61 |
Correct |
96 ms |
36168 KB |
Output is correct |
62 |
Correct |
161 ms |
36692 KB |
Output is correct |
63 |
Correct |
242 ms |
37536 KB |
Output is correct |
64 |
Correct |
213 ms |
37460 KB |
Output is correct |
65 |
Correct |
276 ms |
39992 KB |
Output is correct |
66 |
Correct |
263 ms |
39760 KB |
Output is correct |
67 |
Correct |
267 ms |
39860 KB |
Output is correct |
68 |
Correct |
254 ms |
39764 KB |
Output is correct |
69 |
Correct |
257 ms |
39640 KB |
Output is correct |
70 |
Correct |
270 ms |
39544 KB |
Output is correct |
71 |
Correct |
309 ms |
42384 KB |
Output is correct |
72 |
Correct |
342 ms |
42424 KB |
Output is correct |
73 |
Correct |
296 ms |
42396 KB |
Output is correct |
74 |
Correct |
325 ms |
42428 KB |
Output is correct |
75 |
Correct |
359 ms |
42188 KB |
Output is correct |
76 |
Correct |
288 ms |
41536 KB |
Output is correct |
77 |
Correct |
401 ms |
46420 KB |
Output is correct |
78 |
Correct |
393 ms |
46416 KB |
Output is correct |
79 |
Correct |
390 ms |
46256 KB |
Output is correct |
80 |
Correct |
375 ms |
46420 KB |
Output is correct |
81 |
Correct |
382 ms |
46056 KB |
Output is correct |
82 |
Correct |
328 ms |
42696 KB |
Output is correct |
83 |
Correct |
390 ms |
46244 KB |
Output is correct |
84 |
Correct |
365 ms |
46168 KB |
Output is correct |
85 |
Correct |
417 ms |
46596 KB |
Output is correct |
86 |
Correct |
382 ms |
46440 KB |
Output is correct |
87 |
Correct |
383 ms |
45668 KB |
Output is correct |
88 |
Correct |
316 ms |
42724 KB |
Output is correct |
89 |
Correct |
267 ms |
38736 KB |
Output is correct |
90 |
Correct |
276 ms |
39248 KB |
Output is correct |
91 |
Correct |
284 ms |
40500 KB |
Output is correct |
92 |
Correct |
302 ms |
40528 KB |
Output is correct |
93 |
Correct |
353 ms |
42844 KB |
Output is correct |
94 |
Correct |
329 ms |
42064 KB |
Output is correct |
95 |
Correct |
381 ms |
43976 KB |
Output is correct |
96 |
Correct |
353 ms |
42624 KB |
Output is correct |
97 |
Correct |
392 ms |
43600 KB |
Output is correct |
98 |
Correct |
364 ms |
45392 KB |
Output is correct |
99 |
Correct |
367 ms |
43312 KB |
Output is correct |
100 |
Correct |
372 ms |
43236 KB |
Output is correct |