Submission #1003584

#	Time	Username	Problem	Language	Result	Execution time	Memory
1003584		onbert	Sprinkler (JOI22_sprinkler)	C++17	9 / 100	1052 ms	183492 KiB

sprinkler

#include <bits/stdc++.h>
using namespace std;
#define int long long
const int maxn = 4e5 + 5, maxN = 2e6 + 5, m = 43;
int n, M;
vector<int> adj[maxn];
int newid[maxn], d[maxn], fa[maxn], a[maxn];
bool vis[maxn];

pair<int,int> range[maxn][m];
void dfs(int u) {
    range[u][0] = {newid[u], newid[u]};
    if (adj[u].size() == 0) return;
    for (int v:adj[u]) dfs(v);
    int sz = adj[u].size();
    int l = 0, r = sz - 1;
    for (int i=1;i<m;i++) {
        while (l < sz && range[adj[u][l]][i-1].first==-1) l++;
        while (r >= 0 && range[adj[u][r]][i-1].first==-1) r--;
        if (l>r) break;
        range[u][i] = {range[adj[u][l]][i-1].first, range[adj[u][r]][i-1].second};
    }
}

int seg[maxN];
void build(int id, int l, int r) {
    seg[id] = 1;
    if (l==r) {
        seg[id] = a[l];
        return;
    }
    int mid = (l+r)/2;
    build(id*2, l, mid); build(id*2+1, mid+1, r);
}
void update(int id, int l, int r, int findl, int findr, int val) {
    if (r<findl || findr<l) return;
    if (findl<=l && r<=findr) {
        seg[id] = seg[id] * val % M;
        return;
    }
    int mid = (l+r)/2;
    update(id*2, l, mid, findl, findr, val);
    update(id*2+1, mid+1, r, findl, findr, val);
}
int qry(int id, int l, int r, int target) {
    if (r<target || target<l) return 1;
    if (l==r) return seg[id];
    int mid = (l+r)/2;
    return (seg[id] * qry(id*2, l, mid, target) % M) * qry(id*2+1, mid+1, r, target) % M;
}

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);
    }
    int A[n+1];
    for (int i=1;i<=n;i++) cin >> A[i];
    queue<int> Q;
    Q.push(1);
    vis[1] = true, d[1] = 0, fa[1] = -1;
    int cnter = 0;
    while (Q.size() > 0) {
        int u = Q.front();
        cnter++;
        newid[u] = cnter;
        for (int v:adj[u]) if (!vis[v]) {
            vis[v] = true, fa[v] = u, d[v] = d[u] + 1;
            adj[v].erase(find(adj[v].begin(), adj[v].end(), u));
            Q.push(v);
        }
        Q.pop();
    }
    for (int i=1;i<=n;i++) for (int j=0;j<m;j++) range[i][j] = {-1, -1};
    dfs(1);
    for (int i=1;i<=n;i++) a[newid[i]] = A[i];
    build(1, 1, n);
    int q;
    cin >> q;
    while (q--) {
        int t;
        cin >> t;
        if (t==1) {
            int x, D, w;
            cin >> x >> D >> w;
            for (int i=0;i<=D;i++) if (range[x][i].first!=-1) update(1, 1, n, range[x][i].first, range[x][i].second, w);
            for (int u = fa[x]; u!=-1 && d[u]>=d[x]-D; u = fa[u]) {
                // cout << u << endl;
                update(1, 1, n, newid[u], newid[u], w);
            }
        } else if (t==2) {
            int x;
            cin >> x;
            cout << qry(1, 1, n, newid[x]) << endl;
        }
        // for (int i=1;i<=n;i++) cout << qry(1, 1, n, newid[i]) << " "; cout << endl;
    }
}

• Subtask 1: 0 / 3
• Subtask 2: 9 / 9
• Subtask 3: 0 / 29
• Subtask 4: 0 / 12
• Subtask 5: 0 / 30
• Subtask 6: 0 / 17