Submission #1312407

#	Time	Username	Problem	Language	Result	Execution time	Memory
1312407		aaaaaaaa	Sterilizing Spray (JOI15_sterilizing)	C++20	10 / 100	65 ms	6964 KiB

sterilizing

#include <bits/stdc++.h>
using namespace std;
#define int long long
struct SegmentTree{
    vector<int> seg, lazy;
    int N, K;
    void init(int n, int k){
        N = n, K = k;
        lazy.resize(n * 4, 1);
        seg.resize(n * 4);
    }
    void push(int node, int start, int end){
        if(lazy[node] == 1) return;
        seg[node] /= lazy[node];
        if(start ^ end){
            lazy[node * 2 + 1] *= lazy[node];
            lazy[node * 2 + 2] *= lazy[node];
        }
        lazy[node] = 1;
    }
    void update(int node, int start, int end, int l, int r){
        push(node, start, end);
        if(start > r || end < l) return;
        if(start >= l && end <= r) {
            lazy[node] = K;
            push(node, start, end);
            return;
        }
        int mid = start + (end - start) / 2;
        update(node * 2 + 1, start, mid, l, r);
        update(node * 2 + 2, mid + 1, end, l, r);
        seg[node] = seg[node * 2 + 1] + seg[node * 2 + 2];
    }
    void set_val(int node, int start, int end, int idx, int val){
        push(node, start, end);
        if(start == end){
            seg[node] = val;
            return;
        }
        int mid = start + (end - start) / 2;
        if(idx <= mid) set_val(node * 2 + 1, start, mid, idx, val);
        else set_val(node * 2 + 2, mid + 1, end, idx, val);
        seg[node] = seg[node * 2 + 1] + seg[node * 2 + 2];
    }
    int query(int node, int start, int end, int l, int r){
        push(node, start, end);
        if(start > r || end < l) return 0;
        if(start >= l && end <= r) return seg[node];
        int mid = start + (end - start) / 2;
        return query(node * 2 + 1, start, mid, l, r) + query(node * 2 + 2, mid + 1, end, l, r);
    }
    int query(int l, int r){
        return query(0, 1, N, l, r);
    }
    void set_val(int idx, int val){
        set_val(0, 1, N, idx, val);
    }
    void update(int l, int r){
        update(0, 1, N, l, r);
    }
} tr;
signed main(){
    ios::sync_with_stdio(0);
    cin.tie(nullptr); cout.tie(nullptr);
    int n, q, k;
    cin >> n >> q >> k;
    tr.init(n, k);
    for(int i = 1, x; i <= n; ++i){
        cin >> x;
        tr.set_val(i, x);
    }
    while(q--){
        int t, l, r;
        cin >> t >> l >> r;
        if(t == 1){
            tr.set_val(l, r);
        }else if(t == 2){
            tr.update(l, r);
        }else{
            cout << tr.query(l, r) << "\n";
        }
    }
    return 0;
}

• Subtask 1: 0 / 5
• Subtask 2: 10 / 10
• Subtask 3: 0 / 10
• Subtask 4: 0 / 75