#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define ar array
const int mxN=1e5;
int n, q, eu[mxN], ev[mxN], tin[mxN], tout[mxN];
ll wlim, ew[mxN], lz[1<<19];
vector<int> adj[mxN];
vector<ll> stk;
void dfs(int u=0, int p=-1, ll d=0) {
tin[u]=stk.size();
stk.push_back(d);
for (int e : adj[u]) {
int v=eu[e]^ev[e]^u;
if (v!=p) {
dfs(v, u, d+ew[e]);
stk.push_back(d);
}
}
tout[u]=stk.size()-1;
}
struct Node {
ll ans, mn, mx, lhs, rhs;
} st[1<<19];
Node cmb(Node a, Node b) {
return {
max({a.ans, b.ans, a.rhs+b.mx, a.mx+b.lhs}),
min(a.mn, b.mn),
max(a.mx, b.mx),
max({a.lhs, b.lhs, -2*a.mn+b.mx}),
max({a.rhs, b.rhs, a.mx-2*b.mn})
};
}
void bld(int u=1, int l=0, int r=2*n-2) {
if (l==r) {
st[u].mn=st[u].mx=stk[l];
st[u].lhs=st[u].rhs=-stk[l];
return;
}
int mid=(l+r)/2;
bld(2*u, l, mid);
bld(2*u+1, mid+1, r);
st[u]=cmb(st[2*u], st[2*u+1]);
}
void psh(int u, int l, int r) {
if (lz[u]) {
st[u].mn+=lz[u], st[u].mx+=lz[u], st[u].lhs-=lz[u], st[u].rhs-=lz[u];
if (l!=r)
lz[2*u]+=lz[u], lz[2*u+1]+=lz[u];
lz[u]=0;
}
}
void upd(int ql, int qr, ll x, int u=1, int l=0, int r=2*n-2) {
psh(u, l, r);
if (l>qr||r<ql)
return;
if (ql<=l&&r<=qr) {
lz[u]+=x;
psh(u, l, r);
return;
}
int mid=(l+r)/2;
upd(ql, qr, x, 2*u, l, mid);
upd(ql, qr, x, 2*u+1, mid+1, r);
st[u]=cmb(st[2*u], st[2*u+1]);
}
int main() {
ios::sync_with_stdio(0);
cin.tie(0);
cin >> n >> q >> wlim;
for (int i=0; i<n-1; ++i) {
cin >> eu[i] >> ev[i] >> ew[i], --eu[i], --ev[i];
adj[eu[i]].push_back(i);
adj[ev[i]].push_back(i);
}
dfs();
bld();
ll ans=0;
while(q--) {
int i;
ll nxt;
cin >> i >> nxt;
i=(i+ans)%(n-1);
nxt=(nxt+ans)%wlim;
int u=tin[eu[i]]<tin[ev[i]]?ev[i]:eu[i];
upd(tin[u], tout[u], nxt-ew[i]);
ew[i]=nxt;
cout << (ans=st[1].ans) << "\n";
}
return 0;
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
2644 KB |
Output is correct |
2 |
Correct |
1 ms |
2644 KB |
Output is correct |
3 |
Correct |
1 ms |
2644 KB |
Output is correct |
4 |
Correct |
2 ms |
2644 KB |
Output is correct |
5 |
Correct |
2 ms |
2644 KB |
Output is correct |
6 |
Correct |
2 ms |
2644 KB |
Output is correct |
7 |
Correct |
1 ms |
2644 KB |
Output is correct |
8 |
Correct |
2 ms |
2644 KB |
Output is correct |
9 |
Correct |
2 ms |
2644 KB |
Output is correct |
10 |
Correct |
2 ms |
2644 KB |
Output is correct |
11 |
Correct |
1 ms |
2644 KB |
Output is correct |
12 |
Correct |
1 ms |
2644 KB |
Output is correct |
13 |
Correct |
2 ms |
2644 KB |
Output is correct |
14 |
Correct |
2 ms |
2644 KB |
Output is correct |
15 |
Correct |
2 ms |
2644 KB |
Output is correct |
16 |
Correct |
2 ms |
2644 KB |
Output is correct |
17 |
Correct |
2 ms |
2644 KB |
Output is correct |
18 |
Correct |
2 ms |
2644 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
2644 KB |
Output is correct |
2 |
Correct |
1 ms |
2644 KB |
Output is correct |
3 |
Correct |
1 ms |
2644 KB |
Output is correct |
4 |
Correct |
2 ms |
2644 KB |
Output is correct |
5 |
Correct |
2 ms |
2644 KB |
Output is correct |
6 |
Correct |
2 ms |
2644 KB |
Output is correct |
7 |
Correct |
1 ms |
2644 KB |
Output is correct |
8 |
Correct |
2 ms |
2644 KB |
Output is correct |
9 |
Correct |
2 ms |
2644 KB |
Output is correct |
10 |
Correct |
2 ms |
2644 KB |
Output is correct |
11 |
Correct |
1 ms |
2644 KB |
Output is correct |
12 |
Correct |
1 ms |
2644 KB |
Output is correct |
13 |
Correct |
2 ms |
2644 KB |
Output is correct |
14 |
Correct |
2 ms |
2644 KB |
Output is correct |
15 |
Correct |
2 ms |
2644 KB |
Output is correct |
16 |
Correct |
2 ms |
2644 KB |
Output is correct |
17 |
Correct |
2 ms |
2644 KB |
Output is correct |
18 |
Correct |
2 ms |
2644 KB |
Output is correct |
19 |
Correct |
6 ms |
3028 KB |
Output is correct |
20 |
Correct |
5 ms |
3084 KB |
Output is correct |
21 |
Correct |
6 ms |
3056 KB |
Output is correct |
22 |
Correct |
6 ms |
3016 KB |
Output is correct |
23 |
Correct |
9 ms |
4876 KB |
Output is correct |
24 |
Correct |
9 ms |
4820 KB |
Output is correct |
25 |
Correct |
9 ms |
4932 KB |
Output is correct |
26 |
Correct |
15 ms |
5272 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
2644 KB |
Output is correct |
2 |
Correct |
2 ms |
2644 KB |
Output is correct |
3 |
Correct |
2 ms |
2644 KB |
Output is correct |
4 |
Correct |
9 ms |
2752 KB |
Output is correct |
5 |
Correct |
50 ms |
3112 KB |
Output is correct |
6 |
Correct |
1 ms |
2644 KB |
Output is correct |
7 |
Correct |
2 ms |
2772 KB |
Output is correct |
8 |
Correct |
2 ms |
2772 KB |
Output is correct |
9 |
Correct |
2 ms |
2772 KB |
Output is correct |
10 |
Correct |
12 ms |
2900 KB |
Output is correct |
11 |
Correct |
76 ms |
4172 KB |
Output is correct |
12 |
Correct |
4 ms |
4564 KB |
Output is correct |
13 |
Correct |
4 ms |
4692 KB |
Output is correct |
14 |
Correct |
6 ms |
4692 KB |
Output is correct |
15 |
Correct |
16 ms |
5036 KB |
Output is correct |
16 |
Correct |
67 ms |
6104 KB |
Output is correct |
17 |
Correct |
40 ms |
31916 KB |
Output is correct |
18 |
Correct |
43 ms |
32364 KB |
Output is correct |
19 |
Correct |
49 ms |
34312 KB |
Output is correct |
20 |
Correct |
73 ms |
35264 KB |
Output is correct |
21 |
Correct |
150 ms |
36668 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
3 ms |
2996 KB |
Output is correct |
2 |
Correct |
10 ms |
3012 KB |
Output is correct |
3 |
Correct |
41 ms |
3640 KB |
Output is correct |
4 |
Correct |
100 ms |
4300 KB |
Output is correct |
5 |
Correct |
11 ms |
6716 KB |
Output is correct |
6 |
Correct |
18 ms |
6864 KB |
Output is correct |
7 |
Correct |
53 ms |
7548 KB |
Output is correct |
8 |
Correct |
94 ms |
8312 KB |
Output is correct |
9 |
Correct |
28 ms |
19276 KB |
Output is correct |
10 |
Correct |
39 ms |
19532 KB |
Output is correct |
11 |
Correct |
94 ms |
20264 KB |
Output is correct |
12 |
Correct |
157 ms |
21008 KB |
Output is correct |
13 |
Correct |
52 ms |
35208 KB |
Output is correct |
14 |
Correct |
63 ms |
36184 KB |
Output is correct |
15 |
Correct |
131 ms |
36860 KB |
Output is correct |
16 |
Correct |
254 ms |
37620 KB |
Output is correct |
17 |
Correct |
152 ms |
36360 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
228 ms |
37884 KB |
Output is correct |
2 |
Correct |
236 ms |
40188 KB |
Output is correct |
3 |
Correct |
215 ms |
40164 KB |
Output is correct |
4 |
Correct |
242 ms |
40208 KB |
Output is correct |
5 |
Correct |
213 ms |
39784 KB |
Output is correct |
6 |
Correct |
252 ms |
38380 KB |
Output is correct |
7 |
Correct |
244 ms |
43040 KB |
Output is correct |
8 |
Correct |
259 ms |
43056 KB |
Output is correct |
9 |
Correct |
259 ms |
43020 KB |
Output is correct |
10 |
Correct |
268 ms |
42996 KB |
Output is correct |
11 |
Correct |
310 ms |
42596 KB |
Output is correct |
12 |
Correct |
225 ms |
40540 KB |
Output is correct |
13 |
Correct |
365 ms |
47740 KB |
Output is correct |
14 |
Correct |
286 ms |
47784 KB |
Output is correct |
15 |
Correct |
315 ms |
47752 KB |
Output is correct |
16 |
Correct |
369 ms |
47776 KB |
Output is correct |
17 |
Correct |
410 ms |
46748 KB |
Output is correct |
18 |
Correct |
316 ms |
42172 KB |
Output is correct |
19 |
Correct |
337 ms |
47764 KB |
Output is correct |
20 |
Correct |
344 ms |
47752 KB |
Output is correct |
21 |
Correct |
320 ms |
47820 KB |
Output is correct |
22 |
Correct |
372 ms |
47796 KB |
Output is correct |
23 |
Correct |
295 ms |
46728 KB |
Output is correct |
24 |
Correct |
259 ms |
42268 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
2644 KB |
Output is correct |
2 |
Correct |
1 ms |
2644 KB |
Output is correct |
3 |
Correct |
1 ms |
2644 KB |
Output is correct |
4 |
Correct |
2 ms |
2644 KB |
Output is correct |
5 |
Correct |
2 ms |
2644 KB |
Output is correct |
6 |
Correct |
2 ms |
2644 KB |
Output is correct |
7 |
Correct |
1 ms |
2644 KB |
Output is correct |
8 |
Correct |
2 ms |
2644 KB |
Output is correct |
9 |
Correct |
2 ms |
2644 KB |
Output is correct |
10 |
Correct |
2 ms |
2644 KB |
Output is correct |
11 |
Correct |
1 ms |
2644 KB |
Output is correct |
12 |
Correct |
1 ms |
2644 KB |
Output is correct |
13 |
Correct |
2 ms |
2644 KB |
Output is correct |
14 |
Correct |
2 ms |
2644 KB |
Output is correct |
15 |
Correct |
2 ms |
2644 KB |
Output is correct |
16 |
Correct |
2 ms |
2644 KB |
Output is correct |
17 |
Correct |
2 ms |
2644 KB |
Output is correct |
18 |
Correct |
2 ms |
2644 KB |
Output is correct |
19 |
Correct |
6 ms |
3028 KB |
Output is correct |
20 |
Correct |
5 ms |
3084 KB |
Output is correct |
21 |
Correct |
6 ms |
3056 KB |
Output is correct |
22 |
Correct |
6 ms |
3016 KB |
Output is correct |
23 |
Correct |
9 ms |
4876 KB |
Output is correct |
24 |
Correct |
9 ms |
4820 KB |
Output is correct |
25 |
Correct |
9 ms |
4932 KB |
Output is correct |
26 |
Correct |
15 ms |
5272 KB |
Output is correct |
27 |
Correct |
1 ms |
2644 KB |
Output is correct |
28 |
Correct |
2 ms |
2644 KB |
Output is correct |
29 |
Correct |
2 ms |
2644 KB |
Output is correct |
30 |
Correct |
9 ms |
2752 KB |
Output is correct |
31 |
Correct |
50 ms |
3112 KB |
Output is correct |
32 |
Correct |
1 ms |
2644 KB |
Output is correct |
33 |
Correct |
2 ms |
2772 KB |
Output is correct |
34 |
Correct |
2 ms |
2772 KB |
Output is correct |
35 |
Correct |
2 ms |
2772 KB |
Output is correct |
36 |
Correct |
12 ms |
2900 KB |
Output is correct |
37 |
Correct |
76 ms |
4172 KB |
Output is correct |
38 |
Correct |
4 ms |
4564 KB |
Output is correct |
39 |
Correct |
4 ms |
4692 KB |
Output is correct |
40 |
Correct |
6 ms |
4692 KB |
Output is correct |
41 |
Correct |
16 ms |
5036 KB |
Output is correct |
42 |
Correct |
67 ms |
6104 KB |
Output is correct |
43 |
Correct |
40 ms |
31916 KB |
Output is correct |
44 |
Correct |
43 ms |
32364 KB |
Output is correct |
45 |
Correct |
49 ms |
34312 KB |
Output is correct |
46 |
Correct |
73 ms |
35264 KB |
Output is correct |
47 |
Correct |
150 ms |
36668 KB |
Output is correct |
48 |
Correct |
3 ms |
2996 KB |
Output is correct |
49 |
Correct |
10 ms |
3012 KB |
Output is correct |
50 |
Correct |
41 ms |
3640 KB |
Output is correct |
51 |
Correct |
100 ms |
4300 KB |
Output is correct |
52 |
Correct |
11 ms |
6716 KB |
Output is correct |
53 |
Correct |
18 ms |
6864 KB |
Output is correct |
54 |
Correct |
53 ms |
7548 KB |
Output is correct |
55 |
Correct |
94 ms |
8312 KB |
Output is correct |
56 |
Correct |
28 ms |
19276 KB |
Output is correct |
57 |
Correct |
39 ms |
19532 KB |
Output is correct |
58 |
Correct |
94 ms |
20264 KB |
Output is correct |
59 |
Correct |
157 ms |
21008 KB |
Output is correct |
60 |
Correct |
52 ms |
35208 KB |
Output is correct |
61 |
Correct |
63 ms |
36184 KB |
Output is correct |
62 |
Correct |
131 ms |
36860 KB |
Output is correct |
63 |
Correct |
254 ms |
37620 KB |
Output is correct |
64 |
Correct |
152 ms |
36360 KB |
Output is correct |
65 |
Correct |
228 ms |
37884 KB |
Output is correct |
66 |
Correct |
236 ms |
40188 KB |
Output is correct |
67 |
Correct |
215 ms |
40164 KB |
Output is correct |
68 |
Correct |
242 ms |
40208 KB |
Output is correct |
69 |
Correct |
213 ms |
39784 KB |
Output is correct |
70 |
Correct |
252 ms |
38380 KB |
Output is correct |
71 |
Correct |
244 ms |
43040 KB |
Output is correct |
72 |
Correct |
259 ms |
43056 KB |
Output is correct |
73 |
Correct |
259 ms |
43020 KB |
Output is correct |
74 |
Correct |
268 ms |
42996 KB |
Output is correct |
75 |
Correct |
310 ms |
42596 KB |
Output is correct |
76 |
Correct |
225 ms |
40540 KB |
Output is correct |
77 |
Correct |
365 ms |
47740 KB |
Output is correct |
78 |
Correct |
286 ms |
47784 KB |
Output is correct |
79 |
Correct |
315 ms |
47752 KB |
Output is correct |
80 |
Correct |
369 ms |
47776 KB |
Output is correct |
81 |
Correct |
410 ms |
46748 KB |
Output is correct |
82 |
Correct |
316 ms |
42172 KB |
Output is correct |
83 |
Correct |
337 ms |
47764 KB |
Output is correct |
84 |
Correct |
344 ms |
47752 KB |
Output is correct |
85 |
Correct |
320 ms |
47820 KB |
Output is correct |
86 |
Correct |
372 ms |
47796 KB |
Output is correct |
87 |
Correct |
295 ms |
46728 KB |
Output is correct |
88 |
Correct |
259 ms |
42268 KB |
Output is correct |
89 |
Correct |
279 ms |
39124 KB |
Output is correct |
90 |
Correct |
225 ms |
39516 KB |
Output is correct |
91 |
Correct |
284 ms |
41040 KB |
Output is correct |
92 |
Correct |
240 ms |
40964 KB |
Output is correct |
93 |
Correct |
280 ms |
43796 KB |
Output is correct |
94 |
Correct |
248 ms |
42752 KB |
Output is correct |
95 |
Correct |
295 ms |
44736 KB |
Output is correct |
96 |
Correct |
287 ms |
43528 KB |
Output is correct |
97 |
Correct |
299 ms |
44664 KB |
Output is correct |
98 |
Correct |
277 ms |
46888 KB |
Output is correct |
99 |
Correct |
271 ms |
44440 KB |
Output is correct |
100 |
Correct |
284 ms |
44280 KB |
Output is correct |