Submission #920445

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
920445	2024-02-02 14:44:31	Ludissey	Cat Exercise (JOI23_ho_t4)	C++14	100 / 100	804 ms	148176 KiB

Main

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#include <bits/stdc++.h>
using namespace std;
#define int long long
vector<vector<int>> adj;
int n; 
const int LOG=63;
vector<int> p;
vector<int> depth;
vector<bool> proc;
vector<bool> visited;
vector<int> parent;
vector<vector<pair<int,int>>> child;
vector<vector<int>> ancestors;
vector<int> sz;
int lca(int a, int b){
    if(depth[b]>depth[a]) swap(a,b);
    int k=depth[a]-depth[b];
    for (int j = LOG-1; j >= 0; j--)
    {
        if(k&((long long)1<<j)) a=ancestors[a][j];
    }
    if(a==b) return a;
    for (int j = LOG-1; j >= 0; j--)
    {
        if(ancestors[a][j]!=ancestors[b][j]) {
            a=ancestors[a][j];
            b=ancestors[b][j];
        }
    }
 
 
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Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:131:22: warning: 'start' may be used uninitialized in this function [-Wmaybe-uninitialized]
  131 |     cout << dfs(start) << "\n";
      |                      ^

• Subtask 1: 7 / 7
• Subtask 2: 7 / 7
• Subtask 3: 7 / 7
• Subtask 4: 10 / 10
• Subtask 5: 20 / 20
• Subtask 6: 23 / 23
• Subtask 7: 26 / 26