Submission #291570

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
291570	2020-09-05 13:37:01	penguinhacker	Putovanje (COCI20_putovanje)	C++17	110 / 110	182 ms	22136 KiB

putovanje

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#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define ar array
const int mxN=2e5;
int n, c1[mxN], c2[mxN], dep[mxN], anc[mxN][18];
vector<ar<int, 3>> adj[mxN];
void dfs1(int u=0, int p=-1) {
  for (int i=1; i<18; ++i) anc[u][i]=anc[anc[u][i-1]][i-1];
  for (auto& v : adj[u]) if (v[0]!=p) {
    c1[v[0]]=v[1];
    c2[v[0]]=v[2];
    dep[v[0]]=dep[u]+1;
    anc[v[0]][0]=u;
    dfs1(v[0], u);
  }
}
int lca(int a, int b) {
  if (dep[a]>dep[b]) swap(a, b);
  for (int i=17; ~i; --i) if (dep[b]-(1<<i)>=dep[a]) b=anc[b][i];
  if (a==b) return a;
  for (int i=17; ~i; --i) if (anc[a][i]!=anc[b][i]) a=anc[a][i], b=anc[b][i];
  return anc[a][0];
}
int cnt[mxN];
 
 
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• Subtask 1: 20 / 20
• Subtask 2: 25 / 25
• Subtask 3: 65 / 65