oj.uz

Submission #867004

# Submission time Handle Problem Language Result Execution time Memory
867004 2023-10-27T15:00:28 Z NeroZein Dynamic Diameter (CEOI19_diameter) C++17
49 / 100
 544 ms 1048576 KB 
#include "bits/stdc++.h"
using namespace std;

#ifdef Nero
#include "Deb.h"
#else
#define deb(...)
#endif

const int N = 3e5 + 5;

int n; 
long long dis[N];
long long weight[N]; 
int cnt, in[N], out[N]; 
vector<pair<int, int>> g[N]; 

struct node {
  long long mx = 0, mn = 0, mxmn = 0, mnmx = 0, ans = 0, lazy = 0;
}seg[N * 4];

node merge(node& lx, node& rx) {
  node ret;
  ret.mx = max(lx.mx, rx.mx);
  ret.mn = min(lx.mn, rx.mn);
  ret.mxmn = max({lx.mxmn, rx.mxmn, lx.mx - 2LL * rx.mn});
  ret.mnmx = max({lx.mnmx, rx.mnmx, - 2LL * lx.mn + rx.mx}); 
  ret.ans = max({lx.ans, rx.ans, lx.mx + rx.mnmx, lx.mxmn + rx.mx});
  return ret;
}

void push(int nd, int l, int r) {
  if (!seg[nd].lazy) {
    return;
  }
  seg[nd].mx += seg[nd].lazy;
  seg[nd].mn += seg[nd].lazy;
  seg[nd].mxmn -= seg[nd].lazy;
  seg[nd].mnmx -= seg[nd].lazy; 
  if (l != r) {
    int mid = (l + r) / 2;
    int rs = nd + ((mid - l + 1) * 2);
    seg[nd + 1].lazy += seg[nd].lazy;
    seg[rs].lazy += seg[nd].lazy; 
  }
  seg[nd].lazy = 0;
}

void upd(int nd, int l, int r, int s, int e, long long v) {
  push(nd, l, r); 
  if (l >= s && r <= e) {    
    seg[nd].lazy = v;
    push(nd, l, r);
    return;
  }
  int mid = (l + r) / 2;
  int rs = nd + ((mid - l + 1) * 2);
  if (mid >= e) {
    upd(nd + 1, l, mid, s, e, v);
    push(rs, mid + 1, r); 
  } else {
    if (mid < s) {
      push(nd + 1, l, mid);
      upd(rs, mid + 1, r, s, e, v); 
    } else {
      upd(nd + 1, l, mid, s, e, v);
      upd(rs, mid + 1, r, s, e, v); 
    }
  }
  seg[nd] = merge(seg[nd + 1], seg[rs]); 
}

void dfs(int v, int pe) {
  cnt++; 
  for (auto [u, i] : g[v]) {
    if (i == pe) {
      continue;
    }
    dis[u] = dis[v] + weight[i]; 
    in[i] = cnt; 
    dfs(u, i); 
    out[i] = cnt - 1;
    upd(0, 0, 2 * n - 2, in[i], out[i], weight[i]); 
    cnt++; 
  }
}

int main(){
  ios::sync_with_stdio(false);
  cin.tie(nullptr);
  int q;
  long long lim;
  cin >> n >> q >> lim;
  for(int i = 0; i < n - 1; ++i) {
    int u, v, w;
    cin >> u >> v >> w;
    weight[i] = w; 
    g[u].emplace_back(v, i);
    g[v].emplace_back(u, i); 
  }
  dfs(1, n); 
  long long last = 0;
  while (q--) {
    long long d, c;
    cin >> d >> c;
    d = (d + last) % (n - 1);
    c = (c + last) % lim;
    upd(0, 0, 2 * n - 2, in[d], out[d], -weight[d]);
    weight[d] = c; 
    upd(0, 0, 2 * n - 2, in[d], out[d], +weight[d]);
    last = max(seg[0].mx, seg[0].ans);
    cout << last << '\n';  
  } 
  return 0;
}

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 10588 KB Output is correct
2 Correct 2 ms 10588 KB Output is correct
3 Correct 2 ms 10588 KB Output is correct
4 Correct 2 ms 10588 KB Output is correct
5 Correct 2 ms 10588 KB Output is correct
6 Correct 2 ms 10588 KB Output is correct
7 Correct 2 ms 10588 KB Output is correct
8 Correct 2 ms 10588 KB Output is correct
9 Correct 2 ms 10588 KB Output is correct
10 Correct 2 ms 10588 KB Output is correct
11 Correct 2 ms 10588 KB Output is correct
12 Correct 3 ms 10584 KB Output is correct
13 Correct 2 ms 10588 KB Output is correct
14 Correct 2 ms 10588 KB Output is correct
15 Correct 2 ms 10588 KB Output is correct
16 Correct 2 ms 10584 KB Output is correct
17 Correct 2 ms 10584 KB Output is correct
18 Correct 2 ms 10588 KB Output is correct

Subtask #2
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 10588 KB Output is correct
2 Correct 2 ms 10588 KB Output is correct
3 Correct 2 ms 10588 KB Output is correct
4 Correct 2 ms 10588 KB Output is correct
5 Correct 2 ms 10588 KB Output is correct
6 Correct 2 ms 10588 KB Output is correct
7 Correct 2 ms 10588 KB Output is correct
8 Correct 2 ms 10588 KB Output is correct
9 Correct 2 ms 10588 KB Output is correct
10 Correct 2 ms 10588 KB Output is correct
11 Correct 2 ms 10588 KB Output is correct
12 Correct 3 ms 10584 KB Output is correct
13 Correct 2 ms 10588 KB Output is correct
14 Correct 2 ms 10588 KB Output is correct
15 Correct 2 ms 10588 KB Output is correct
16 Correct 2 ms 10584 KB Output is correct
17 Correct 2 ms 10584 KB Output is correct
18 Correct 2 ms 10588 KB Output is correct
19 Correct 7 ms 11100 KB Output is correct
20 Correct 8 ms 10968 KB Output is correct
21 Correct 7 ms 10844 KB Output is correct
22 Correct 8 ms 11040 KB Output is correct
23 Correct 9 ms 11868 KB Output is correct
24 Correct 10 ms 11868 KB Output is correct
25 Correct 11 ms 11920 KB Output is correct
26 Correct 13 ms 12284 KB Output is correct

Subtask #3
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 10588 KB Output is correct
2 Correct 2 ms 10588 KB Output is correct
3 Correct 4 ms 10844 KB Output is correct
4 Correct 9 ms 10588 KB Output is correct
5 Correct 38 ms 11064 KB Output is correct
6 Correct 2 ms 10588 KB Output is correct
7 Correct 2 ms 10844 KB Output is correct
8 Correct 2 ms 10844 KB Output is correct
9 Correct 3 ms 10844 KB Output is correct
10 Correct 13 ms 10892 KB Output is correct
11 Correct 57 ms 11152 KB Output is correct
12 Correct 4 ms 11864 KB Output is correct
13 Correct 4 ms 11868 KB Output is correct
14 Correct 8 ms 11868 KB Output is correct
15 Correct 21 ms 11992 KB Output is correct
16 Correct 75 ms 12196 KB Output is correct
17 Correct 65 ms 36028 KB Output is correct
18 Correct 61 ms 36040 KB Output is correct
19 Correct 64 ms 36144 KB Output is correct
20 Correct 86 ms 36364 KB Output is correct
21 Correct 184 ms 36804 KB Output is correct

Subtask #4
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 10844 KB Output is correct
2 Correct 11 ms 10976 KB Output is correct
3 Correct 45 ms 10996 KB Output is correct
4 Correct 87 ms 11348 KB Output is correct
5 Correct 9 ms 12888 KB Output is correct
6 Correct 23 ms 13240 KB Output is correct
7 Correct 65 ms 13148 KB Output is correct
8 Correct 119 ms 13564 KB Output is correct
9 Correct 38 ms 24396 KB Output is correct
10 Correct 50 ms 24400 KB Output is correct
11 Correct 128 ms 24824 KB Output is correct
12 Correct 174 ms 24920 KB Output is correct
13 Correct 75 ms 36144 KB Output is correct
14 Correct 89 ms 36288 KB Output is correct
15 Correct 155 ms 36784 KB Output is correct
16 Correct 227 ms 36724 KB Output is correct
17 Correct 176 ms 36804 KB Output is correct

Subtask #5
0 / 24.0

# Verdict Execution time Memory Grader output
1 Runtime error 544 ms 1048576 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #6
0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 10588 KB Output is correct
2 Correct 2 ms 10588 KB Output is correct
3 Correct 2 ms 10588 KB Output is correct
4 Correct 2 ms 10588 KB Output is correct
5 Correct 2 ms 10588 KB Output is correct
6 Correct 2 ms 10588 KB Output is correct
7 Correct 2 ms 10588 KB Output is correct
8 Correct 2 ms 10588 KB Output is correct
9 Correct 2 ms 10588 KB Output is correct
10 Correct 2 ms 10588 KB Output is correct
11 Correct 2 ms 10588 KB Output is correct
12 Correct 3 ms 10584 KB Output is correct
13 Correct 2 ms 10588 KB Output is correct
14 Correct 2 ms 10588 KB Output is correct
15 Correct 2 ms 10588 KB Output is correct
16 Correct 2 ms 10584 KB Output is correct
17 Correct 2 ms 10584 KB Output is correct
18 Correct 2 ms 10588 KB Output is correct
19 Correct 7 ms 11100 KB Output is correct
20 Correct 8 ms 10968 KB Output is correct
21 Correct 7 ms 10844 KB Output is correct
22 Correct 8 ms 11040 KB Output is correct
23 Correct 9 ms 11868 KB Output is correct
24 Correct 10 ms 11868 KB Output is correct
25 Correct 11 ms 11920 KB Output is correct
26 Correct 13 ms 12284 KB Output is correct
27 Correct 2 ms 10588 KB Output is correct
28 Correct 2 ms 10588 KB Output is correct
29 Correct 4 ms 10844 KB Output is correct
30 Correct 9 ms 10588 KB Output is correct
31 Correct 38 ms 11064 KB Output is correct
32 Correct 2 ms 10588 KB Output is correct
33 Correct 2 ms 10844 KB Output is correct
34 Correct 2 ms 10844 KB Output is correct
35 Correct 3 ms 10844 KB Output is correct
36 Correct 13 ms 10892 KB Output is correct
37 Correct 57 ms 11152 KB Output is correct
38 Correct 4 ms 11864 KB Output is correct
39 Correct 4 ms 11868 KB Output is correct
40 Correct 8 ms 11868 KB Output is correct
41 Correct 21 ms 11992 KB Output is correct
42 Correct 75 ms 12196 KB Output is correct
43 Correct 65 ms 36028 KB Output is correct
44 Correct 61 ms 36040 KB Output is correct
45 Correct 64 ms 36144 KB Output is correct
46 Correct 86 ms 36364 KB Output is correct
47 Correct 184 ms 36804 KB Output is correct
48 Correct 3 ms 10844 KB Output is correct
49 Correct 11 ms 10976 KB Output is correct
50 Correct 45 ms 10996 KB Output is correct
51 Correct 87 ms 11348 KB Output is correct
52 Correct 9 ms 12888 KB Output is correct
53 Correct 23 ms 13240 KB Output is correct
54 Correct 65 ms 13148 KB Output is correct
55 Correct 119 ms 13564 KB Output is correct
56 Correct 38 ms 24396 KB Output is correct
57 Correct 50 ms 24400 KB Output is correct
58 Correct 128 ms 24824 KB Output is correct
59 Correct 174 ms 24920 KB Output is correct
60 Correct 75 ms 36144 KB Output is correct
61 Correct 89 ms 36288 KB Output is correct
62 Correct 155 ms 36784 KB Output is correct
63 Correct 227 ms 36724 KB Output is correct
64 Correct 176 ms 36804 KB Output is correct
65 Runtime error 544 ms 1048576 KB Execution killed with signal 9
66 Halted 0 ms 0 KB -