Submission #872861

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
872861	2023-11-14 01:18:14	MinaRagy06	Two Currencies (JOI23_currencies)	C++17	100 / 100	1766 ms	169384 KiB

currencies

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#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define mid ((l + r) >> 1)
const int N = 100'005;
const ll inf = 1e18;
int anc[N][17], st[N], en[N], t;
ll h[N];
vector<array<int, 2>> adj[N];
array<ll, 2> a[N];
void dfs(int i, int par, ll d) {
  h[i] = d;
  anc[i][0] = par;
  for (int j = 1; j < 17; j++) {
    anc[i][j] = anc[anc[i][j - 1]][j - 1];
  }
  st[i] = t++;
  for (auto [nxt, w] : adj[i]) {
    if (nxt == par) continue;
    dfs(nxt, i, d + w);
  }
  en[i] = t - 1;
}
int getlca(int u, int v) {
  if (st[u] > st[v]) swap(u, v);
  if (st[u] <= st[v] && en[v] <= en[u]) {
    return u;
  }
  for (int j = 16; j >= 0; j--) {
 
 
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• Subtask 1: 10 / 10
• Subtask 2: 28 / 28
• Subtask 3: 30 / 30
• Subtask 4: 32 / 32