Submission #850845

#	Time	Username	Problem	Language	Result	Execution time	Memory
850845		EJIC_B_KEDAX	Sprinkler (JOI22_sprinkler)	C++14	100 / 100	2132 ms	203864 KiB

sprinkler

#include <bits/stdc++.h>
#include <random>

#ifndef LOCAL
    #pragma GCC optimize("O3")
    #pragma GCC optimize("Ofast")
    #pragma GCC optimize("unroll-loops")
    #pragma GCC target("avx,avx2,bmi,bmi2,popcnt,lzcnt")
#endif
using namespace std;
typedef long long ll;
typedef double dd;
typedef long double ld;
typedef unsigned int uii;
#define x first
#define y second
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()



void solve();

mt19937_64 mt(1);

int32_t main() {
#ifdef LOCAL
    freopen("input.in", "r", stdin);
    freopen("output.out", "w", stdout);
#else
    ios::sync_with_stdio(false);
    cin.tie(nullptr); cout.tie(nullptr);
    //freopen("amusing.in", "r", stdin);
    //freopen("amusing.out", "w", stdout);
#endif
    cout << fixed << setprecision(30);
    int tests = 1;
    //cin >> tests;
    while (tests--) {
        solve();
    }
}

ll mod;

struct st_down {
    vector<long long> tree;
    int n;

    void build(const vector<int>& arr) {
        n = arr.size();
        tree.assign(2 * n, 1);
        for (int i = 0; i < n; i++) {
            tree[n + i] = arr[i];
        }
    }

    long long find_value(int pos) {
        pos += n;
        long long ans = 1;
        while (pos > 0) {
            ans = (ans * tree[pos]) % mod;
            pos >>= 1;
        }
        return ans;
    }

    void segment_update(int l, int r, int addval) {
        l += n;
        r += n;
        while (l < r) {
            if (l & 1) {
                tree[l++] *= addval;
                tree[l - 1] %= mod;
            }
            if (r & 1) {
                tree[--r] *= addval;
                tree[r] %= mod;
            }
            l >>= 1;
            r >>= 1;
        }
    }
};

pair<int, int> seg[200200][41];

void dfs(int s, int p, vector<vector<int>>& g, int dist[], vector<vector<int>>& d, int pr[]) {
    if (p != -1) {
        dist[s] = dist[p] + 1;
    } else {
        dist[s] = 0;
    }
    pr[s] = p;
    d[dist[s]].push_back(s);
    seg[s][0] = {d[dist[s]].size() - 1, d[dist[s]].size() - 1};
    for (int i = 1; i < 41; i++) {
        seg[s][i] = {INT32_MAX, INT32_MIN};
    }
    for (int i : g[s]) {
        if (i != p) {
            dfs(i, s, g, dist, d, pr);
            for (int j = 1; j < 41; j++) {
                seg[s][j].x = min(seg[s][j].x, seg[i][j - 1].x);
            }
            for (int j = 1; j < 41; j++) {
                seg[s][j].y = max(seg[s][j].y, seg[i][j - 1].y);
            }
        }
    }
}

void solve() {
    int n;
    cin >> n >> mod;
    vector<vector<int>> g(n), d(n);
    int deg[200200], dist[200200], h[200200], p[200200];
    for (int i = 0; i < n; i++) {
        deg[i] = 0;
    }
    int pr[200200][41], lev[200200][41];
    for (int i = 0; i < n - 1; i++) {
        int u, v;
        cin >> u >> v; u--; v--;
        g[u].push_back(v);
        g[v].push_back(u);
        deg[u]++;
        deg[v]++;
    }
    int root = 0;
    for (int i = 0; i < n; i++) {
        if (deg[i] == 1) {
            root = i;
            break;
        }
    }
    dfs(root, -1, g, dist, d, p);
    for (int i = 0; i < n; i++) {
        int nw = i, lv = 0, nlev = 0;
        for (int c = 0; c < 41; c++) {
            while (c > nlev) {
                nlev++;
                if (p[nw] != -1) {
                    lv++;
                    nw = p[nw];
                }
            }
            pr[i][c] = nw;
            lev[i][c] = lv;
        }
    }
    for (int i = 0; i < n; i++) {
        cin >> h[i];
    }
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < d[i].size(); j++) {
            d[i][j] = h[d[i][j]];
        }
    }
    st_down dec[200200];
    for (int i = 0; i < n; i++) {
        dec[i].build(d[i]);
    }
    int q;
    cin >> q;
    while (q--) {
        int t;
        cin >> t;
        if (t == 1) {
            int x, dk, wk;
            cin >> x >> dk >> wk; x--;
            for (int l = max(-dk, dist[x] - n + 1); l <= dk && l <= dist[x]; l++) {
                int c = (dk + l) / 2;
                if (c - l >= 0 && c - l <= dk) {
                    int l1, r1;
                    l1 = seg[pr[x][c]][lev[x][c] - l].x;
                    r1 = seg[pr[x][c]][lev[x][c] - l].y;
                    dec[dist[x] - l].segment_update(l1, r1 + 1, wk);
                }
            }
        } else {
            int x;
            cin >> x; x--;
            cout << (dec[dist[x]].find_value(seg[x][0].x) % mod + mod) % mod << '\n';
        }
    }
}

Compilation message (stderr)

sprinkler.cpp: In function 'void solve()':
sprinkler.cpp:156:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  156 |         for (int j = 0; j < d[i].size(); j++) {
      |                         ~~^~~~~~~~~~~~~

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