#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair <int, int> pii;
typedef pair <ll, ll> pll;
#define long unsigned long
#define pb push_back
#define mp make_pair
#define all(v) (v).begin(),(v).end()
#define rall(v) (v).rbegin(),(v).rend()
#define lb lower_bound
#define ub upper_bound
#define sz(v) int((v).size())
#define do_not_disturb ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define endl '\n'
const int N = 1e5+7;
set <pair <int, ll>> graph[N];
vector <pair <pii, ll>> edges;
ll df, vf;
void find_furthest(int v, int p, ll dist = 0) {
if (dist > df) {
df = dist;
vf = v;
}
for (auto to : graph[v]) {
if (to.first == p) continue;
find_furthest(to.first, v, dist+to.second);
}
}
void solve() {
int n, q;
ll w;
cin >> n >> q >> w;
for (int i = 0; i < n-1; i++) {
int a, b;
ll c;
cin >> a >> b >> c;
edges.pb(mp(mp(a, b), c));
graph[a].insert(mp(b, c));
graph[b].insert(mp(a, c));
}
if (n <= 5000) {
ll last = 0;
while (q--) {
ll d, e;
cin >> d >> e;
d = (d + last) % (n - 1);
e = (e + last) % w;
auto a = edges[d].first.first, b = edges[d].first.second;
auto &c = edges[d].second;
graph[a].erase(graph[a].find(mp(b, c)));
graph[b].erase(graph[b].find(mp(a, c)));
c = e;
graph[a].insert(mp(b, c));
graph[b].insert(mp(a, c));
df = vf = 0;
find_furthest(1, 1);
df = 0;
find_furthest(vf, vf);
cout << df << endl;
last = df;
}
}
}
int main() {
do_not_disturb
int t = 1;
//~ cin >> t;
while (t--) {
solve();
}
return 0;
}
/*
*/
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
3 ms |
4948 KB |
Output is correct |
2 |
Correct |
4 ms |
4948 KB |
Output is correct |
3 |
Correct |
4 ms |
4948 KB |
Output is correct |
4 |
Correct |
3 ms |
5020 KB |
Output is correct |
5 |
Correct |
3 ms |
4948 KB |
Output is correct |
6 |
Correct |
3 ms |
5016 KB |
Output is correct |
7 |
Correct |
3 ms |
4948 KB |
Output is correct |
8 |
Correct |
3 ms |
5024 KB |
Output is correct |
9 |
Correct |
3 ms |
4948 KB |
Output is correct |
10 |
Correct |
3 ms |
4948 KB |
Output is correct |
11 |
Correct |
3 ms |
4948 KB |
Output is correct |
12 |
Correct |
3 ms |
5020 KB |
Output is correct |
13 |
Correct |
3 ms |
5020 KB |
Output is correct |
14 |
Correct |
3 ms |
4948 KB |
Output is correct |
15 |
Correct |
3 ms |
4948 KB |
Output is correct |
16 |
Correct |
3 ms |
5016 KB |
Output is correct |
17 |
Correct |
3 ms |
5012 KB |
Output is correct |
18 |
Correct |
3 ms |
4948 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
3 ms |
4948 KB |
Output is correct |
2 |
Correct |
4 ms |
4948 KB |
Output is correct |
3 |
Correct |
4 ms |
4948 KB |
Output is correct |
4 |
Correct |
3 ms |
5020 KB |
Output is correct |
5 |
Correct |
3 ms |
4948 KB |
Output is correct |
6 |
Correct |
3 ms |
5016 KB |
Output is correct |
7 |
Correct |
3 ms |
4948 KB |
Output is correct |
8 |
Correct |
3 ms |
5024 KB |
Output is correct |
9 |
Correct |
3 ms |
4948 KB |
Output is correct |
10 |
Correct |
3 ms |
4948 KB |
Output is correct |
11 |
Correct |
3 ms |
4948 KB |
Output is correct |
12 |
Correct |
3 ms |
5020 KB |
Output is correct |
13 |
Correct |
3 ms |
5020 KB |
Output is correct |
14 |
Correct |
3 ms |
4948 KB |
Output is correct |
15 |
Correct |
3 ms |
4948 KB |
Output is correct |
16 |
Correct |
3 ms |
5016 KB |
Output is correct |
17 |
Correct |
3 ms |
5012 KB |
Output is correct |
18 |
Correct |
3 ms |
4948 KB |
Output is correct |
19 |
Correct |
230 ms |
5212 KB |
Output is correct |
20 |
Correct |
223 ms |
5220 KB |
Output is correct |
21 |
Correct |
234 ms |
5280 KB |
Output is correct |
22 |
Correct |
277 ms |
5204 KB |
Output is correct |
23 |
Correct |
1725 ms |
5972 KB |
Output is correct |
24 |
Correct |
1846 ms |
6120 KB |
Output is correct |
25 |
Correct |
1945 ms |
6024 KB |
Output is correct |
26 |
Correct |
2447 ms |
6332 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
3 ms |
4948 KB |
Output is correct |
2 |
Correct |
4 ms |
4948 KB |
Output is correct |
3 |
Correct |
5 ms |
4948 KB |
Output is correct |
4 |
Correct |
21 ms |
5152 KB |
Output is correct |
5 |
Correct |
89 ms |
6068 KB |
Output is correct |
6 |
Correct |
3 ms |
4948 KB |
Output is correct |
7 |
Correct |
4 ms |
5076 KB |
Output is correct |
8 |
Correct |
5 ms |
5020 KB |
Output is correct |
9 |
Correct |
38 ms |
5116 KB |
Output is correct |
10 |
Correct |
317 ms |
5344 KB |
Output is correct |
11 |
Correct |
1459 ms |
6544 KB |
Output is correct |
12 |
Incorrect |
6 ms |
5716 KB |
Output isn't correct |
13 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
27 ms |
5076 KB |
Output is correct |
2 |
Correct |
247 ms |
5376 KB |
Output is correct |
3 |
Correct |
1189 ms |
5772 KB |
Output is correct |
4 |
Correct |
2360 ms |
6688 KB |
Output is correct |
5 |
Incorrect |
7 ms |
6500 KB |
Output isn't correct |
6 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Incorrect |
98 ms |
21308 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
3 ms |
4948 KB |
Output is correct |
2 |
Correct |
4 ms |
4948 KB |
Output is correct |
3 |
Correct |
4 ms |
4948 KB |
Output is correct |
4 |
Correct |
3 ms |
5020 KB |
Output is correct |
5 |
Correct |
3 ms |
4948 KB |
Output is correct |
6 |
Correct |
3 ms |
5016 KB |
Output is correct |
7 |
Correct |
3 ms |
4948 KB |
Output is correct |
8 |
Correct |
3 ms |
5024 KB |
Output is correct |
9 |
Correct |
3 ms |
4948 KB |
Output is correct |
10 |
Correct |
3 ms |
4948 KB |
Output is correct |
11 |
Correct |
3 ms |
4948 KB |
Output is correct |
12 |
Correct |
3 ms |
5020 KB |
Output is correct |
13 |
Correct |
3 ms |
5020 KB |
Output is correct |
14 |
Correct |
3 ms |
4948 KB |
Output is correct |
15 |
Correct |
3 ms |
4948 KB |
Output is correct |
16 |
Correct |
3 ms |
5016 KB |
Output is correct |
17 |
Correct |
3 ms |
5012 KB |
Output is correct |
18 |
Correct |
3 ms |
4948 KB |
Output is correct |
19 |
Correct |
230 ms |
5212 KB |
Output is correct |
20 |
Correct |
223 ms |
5220 KB |
Output is correct |
21 |
Correct |
234 ms |
5280 KB |
Output is correct |
22 |
Correct |
277 ms |
5204 KB |
Output is correct |
23 |
Correct |
1725 ms |
5972 KB |
Output is correct |
24 |
Correct |
1846 ms |
6120 KB |
Output is correct |
25 |
Correct |
1945 ms |
6024 KB |
Output is correct |
26 |
Correct |
2447 ms |
6332 KB |
Output is correct |
27 |
Correct |
3 ms |
4948 KB |
Output is correct |
28 |
Correct |
4 ms |
4948 KB |
Output is correct |
29 |
Correct |
5 ms |
4948 KB |
Output is correct |
30 |
Correct |
21 ms |
5152 KB |
Output is correct |
31 |
Correct |
89 ms |
6068 KB |
Output is correct |
32 |
Correct |
3 ms |
4948 KB |
Output is correct |
33 |
Correct |
4 ms |
5076 KB |
Output is correct |
34 |
Correct |
5 ms |
5020 KB |
Output is correct |
35 |
Correct |
38 ms |
5116 KB |
Output is correct |
36 |
Correct |
317 ms |
5344 KB |
Output is correct |
37 |
Correct |
1459 ms |
6544 KB |
Output is correct |
38 |
Incorrect |
6 ms |
5716 KB |
Output isn't correct |
39 |
Halted |
0 ms |
0 KB |
- |