Submission #1236879

#	Time	Username	Problem	Language	Result	Execution time	Memory
1236879		JelaByteEngineer	Sterilizing Spray (JOI15_sterilizing)	C++20	100 / 100	150 ms	4680 KiB

sterilizing

#include <bits/stdc++.h>
using namespace std;
#define int long long
vector <int> niz;
vector <int> st;
int k;
void build (int node, int l, int r)
{
    if(l==r) st[node]=niz[l];
    else
    {
        int mid=(l+r)/2;
        build(2*node, l, mid); build(2*node+1, mid+1, r);
        st[node]=st[2*node]+st[2*node+1];
    }
}

void upd1(int node, int l, int r, int ind, int val)
{
    if(l==r)
    {
        st[node]=val; niz[ind]=val;
    }
    else
    {
        int mid=(l+r)/2;
        if(ind<=mid) upd1(2*node, l, mid, ind, val);
        else upd1(2*node+1, mid+1, r, ind, val);
        st[node]=st[2*node]+st[2*node+1];
    }
}
void upd2 (int node, int l, int r, int ql, int qr)
{
    if (st[node]==0 || r<ql || l>qr) return;
    if (l==r)
    {
        st[node]=st[node]/k; niz[l]=niz[l]/k;
    }
    else
    {
        int mid=(l+r)/2;
        upd2(2*node, l, mid, ql, qr);
        upd2(2*node+1, mid+1, r, ql, qr);
        st[node]=st[2*node]+st[2*node+1];
    }
}
int query (int node, int l, int r, int ql, int qr)
{
    if(r<ql || l>qr) return 0;
    if(ql<=l && r<=qr) return st[node];
    int mid=(l+r)/2;
    return query(2*node, l, mid, ql, qr)+query(2*node+1, mid+1, r, ql, qr);
}
signed main()
{
    ios::sync_with_stdio(false);
    cin.tie(0);
    int n, q; cin>>n>>q>>k;
    niz.resize(n);
    for (int i=0; i<n; i++) cin>>niz[i];
    st.resize(4*n);
    build(1, 0, n-1);
    while (q--)
    {
        int op; cin>>op;
        int l, r; cin>>l>>r;
        l--; r--;
        if (op==1)
        {
            r++;
            upd1(1, 0, n-1, l, r);
        }
        else if (op==2)
        {
            if (k!=1) upd2(1, 0, n-1, l, r);
        }
        else
        {
            cout<<query(1, 0, n-1, l, r)<<endl;
        }
    }
    return 0;
}

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