Submission #1004607

#	Time	Username	Problem	Language	Result	Execution time	Memory
1004607		onbert	Sprinkler (JOI22_sprinkler)	C++17	100 / 100	986 ms	97212 KiB

sprinkler

#include <bits/stdc++.h>
using namespace std;
#define int long long
const int maxn = 2e5 + 5, m = 43;
int n, M;
vector<int> adj[maxn];
int d[maxn], fa[maxn];
bool vis[maxn];

void dfs(int u) {
    vis[u] = true;
    if (adj[u].size() == 0) return;
    for (int v:adj[u]) if (!vis[v]) {
        d[v] = d[u] + 1, fa[v] = u;
        dfs(v);
    }
}

signed main() {
    ios::sync_with_stdio(0); cin.tie(0);
    cin >> n >> M;
    for (int i=1;i<=n-1;i++) {
        int u, v;
        cin >> u >> v;
        adj[u].push_back(v);
        adj[v].push_back(u);
    }
    fa[1] = -1, d[1] = 0;
    dfs(1);
    int val[n+1][m];
    for (int i=1;i<=n;i++) for (int j=0;j<m;j++) val[i][j] = 1;
    for (int i=1;i<=n;i++) cin >> val[i][0];
    int q;
    cin >> q;
    while (q--) {
        int t;
        cin >> t;
        if (t==1) {
            int x, D, w;
            cin >> x >> D >> w;
            int v = x;
            // cout << "test" << endl;
            for (int dep = d[x]+D; dep>=d[x]-D && dep >= 0; dep--) {
                // cout << v << endl;
                if (fa[v]!=-1 && dep-d[v] + d[x]-d[v] + 2 <= D) v = fa[v];
                val[v][dep - d[v]] = val[v][dep - d[v]] * w % M;
                // cout << v << " " << dep - d[v] << endl;
            }
        } else if (t==2) {
            int x;
            cin >> x;
            int ans = 1;
            for (int v = x; v != -1 && d[x] - d[v] < m; v = fa[v]) {
                ans = ans * val[v][d[x] - d[v]] % M;
                // cout << v << " " << d[x] - d[v] << endl;
            }
            cout << ans << endl;
        }
    }
}

• Subtask 1: 3 / 3
• Subtask 2: 9 / 9
• Subtask 3: 29 / 29
• Subtask 4: 12 / 12
• Subtask 5: 30 / 30
• Subtask 6: 17 / 17