Submission #806990

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
806990	2023-08-04 12:02:03	lukameladze	Tourism (JOI23_tourism)	C++17	100 / 100	923 ms	53484 KiB

tourism

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# include <bits/stdc++.h>
using namespace std;
#define f first
#define s second
//#define int long long
#define ll long long
#define pii pair <int, int>
#define pb push_back
#define ai3 array <int, 3>
const int N = 3e5 + 5;
int n, m, q,in[N], a[N], out[N], tin, lv[N], par[N][20];
vector <int> v[N];
vector < pii > updates;
void dfs(int a, int p) {
    in[a] = ++tin;
    lv[a] = lv[p] + 1;
    par[a][0] = p;
    for (int i = 1; i <= 18; i++) {
        par[a][i] = par[par[a][i - 1]][i - 1];
    }
    for (int to : v[a]) {
        if (to == p) continue;
        dfs(to, a);
    }
    out[a] = tin;
}
int upper(int a, int b) {
    return (in[a] <= in[b] && out[a] >= out[b]);
}
int lca(int a, int b) {
 
 
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• Subtask 1: 5 / 5
• Subtask 2: 5 / 5
• Subtask 3: 7 / 7
• Subtask 4: 18 / 18
• Subtask 5: 24 / 24
• Subtask 6: 41 / 41