Submission #1277329

#	Time	Username	Problem	Language	Result	Execution time	Memory
1277329		nanaseyuzuki	Sterilizing Spray (JOI15_sterilizing)	C++20	100 / 100	138 ms	5732 KiB

sterilizing

#include <bits/stdc++.h>
// Author: Kazuki_Will_Win_VOI_8703 
#define fi first
#define se second
#define pii pair<int, int>
#define int long long
#define all(a) a.begin(), a.end()
using namespace std;

const int mn = 1e5 + 5, inf = 1e18;

int n, q, k, a[mn];

struct node{
    int mx, val;

    node operator+ (const node& other){
        node res = {0, 0};
        res.mx = max(mx, other.mx);
        res.val = val + other.val;
        return res;
    }
} st[mn << 2];

void build(int id, int l, int r){
    if(l == r){
        st[id].mx = a[l];
        st[id].val = a[l];
        return;
    }
    int mid = (l + r) >> 1;
    build(id << 1, l, mid);
    build(id << 1 | 1, mid + 1, r);
    st[id] = st[id << 1] + st[id << 1 | 1];
}

void update_range(int id, int l, int r, int u, int v){
    if(l > v || r < u || st[id].mx == 0) return;
    if(l == r){ 
        st[id].mx /= k;
        st[id].val /= k;
        return;
    }
    int mid = (l + r) >> 1;
    update_range(id << 1, l, mid, u, v);
    update_range(id << 1 | 1, mid + 1, r, u, v);
    st[id] = st[id << 1] + st[id << 1 | 1];
}

void update(int id, int l, int r, int pos, int val){
    if(l > pos || r < pos) return;
    if(l == r){
        st[id].mx = val;
        st[id].val = val;
        return;
    }
    int mid = (l + r) >> 1;
    update(id << 1, l, mid, pos, val);
    update(id << 1 | 1, mid + 1, r, pos, val);
    st[id] = st[id << 1] + st[id << 1 | 1];
}

int get(int id, int l, int r, int u, int v){
    if(l > v || r < u) return 0;
    if(l >= u && r <= v) return st[id].val;
    int mid = (l + r) >> 1;
    return get(id << 1, l, mid, u, v) + get(id << 1 | 1, mid + 1, r, u, v);
}

void solve(){
    cin >> n >> q >> k;
    for(int i = 1; i <= n; i ++) cin >> a[i];
    build(1, 1, n);
    while(q--){
        int t, u, v; cin >> t >> u >> v;
        if(t == 1) update(1, 1, n, u, v);
        else if(t == 2){
            if(k != 1) update_range(1, 1, n, u, v);
        }
        else cout << get(1, 1, n, u, v) << '\n';
    }
}

signed main(){
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
    int t = 1;
    // cin >> t;
    while(t--) solve();
}

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