Submission #892724

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
892724	2023-12-25 18:21:23	box	Construction of Highway (JOI18_construction)	C++17	100 / 100	390 ms	38640 KiB

construction

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#include <bits/stdc++.h>
using namespace std;
#define cerr if (0) cerr
#define ar array
#define sz(v) int(std::size(v))
using i64 = long long;
using pii = pair<int, int>;
const int N = 1e5;
int n, c[N];
vector<int> adj[N];
vector<pii> con;
vector<int> chain[N];
int parent[N], child[N], root[N], depth[N];
int dfs_sz(int i) {
    int s = 1, x = 0;
    child[i] = -1;
    for (int j : adj[i]) if (parent[i] != j) {
        parent[j] = i;
        depth[j] = depth[i] + 1;
        int y = dfs_sz(j);
        if (y > x) {
            x = y;
            child[i] = j;
        }
        s += y;
 
 
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• Subtask 1: 7 / 7
• Subtask 2: 9 / 9
• Subtask 3: 84 / 84