제출 #874429

#제출 시각아이디문제언어결과실행 시간메모리
87442912345678Growing Trees (BOI11_grow)C++17
100 / 100
118 ms4192 KiB
#include <bits/stdc++.h>

using namespace std;

const int nx=1e5+5;

int n, m, x, y;
char t;
vector<int> v;

struct segtree
{
    int d[4*nx], lz[4*nx];
    void pushlz(int l, int r, int i)
    {
        if (l==r) return d[i]+=lz[i], lz[i]=0, void();
        lz[2*i]+=lz[i];
        lz[2*i+1]+=lz[i];
        d[i]+=lz[i];
        lz[i]=0;
    }
    void build(int l, int r, int i)
    {
        if (l==r) return void(d[i]=v[l-1]);
        int md=(l+r)/2;
        build(l, md, 2*i);
        build(md+1, r, 2*i+1);
        d[i]=d[2*i+1];
    }
    void update(int l, int r, int i, int ul, int ur)
    {
        pushlz(l, r, i);
        if (r<ul||ur<l) return;
        if (ul<=l&&r<=ur) return lz[i]++, pushlz(l, r, i), void();
        int md=(l+r)/2;
        update(l, md, 2*i, ul, ur);
        update(md+1, r, 2*i+1, ul, ur);
        d[i]=d[2*i+1];
    }
    int query(int l, int r, int i, int idx)
    {
        pushlz(l, r, i);
        if (l==r) return d[i];
        int md=(l+r)/2;
        if (idx<=md) return query(l, md, 2*i, idx);
        return query(md+1, r, 2*i+1, idx);
    }
    int lower_bound(int l, int r, int i, int vl)
    {
        pushlz(l, r, i);
        if (l==r) return l;
        int md=(l+r)/2;
        pushlz(l, md ,2*i);
        pushlz(md+1, r, 2*i+1);
        if (d[2*i]>=vl) return lower_bound(l, md ,2*i, vl);
        else return lower_bound(md+1, r, 2*i+1, vl);
    }
    void show()
    {
        for (int i=1; i<=n+1; i++) cout<<query(1, n+1, 1, i)<<' ';
        cout<<'\n';
    }
} s;

int main()
{
    cin.tie(NULL)->sync_with_stdio(false);
    cin>>n>>m;
    v.resize(n+1);
    for (int i=0; i<n; i++) cin>>v[i];
    v[n]=2e9;
    sort(v.begin(), v.end());
    s.build(1, n+1, 1);
    //s.show();
    for (int i=0; i<m; i++)
    {
        cin>>t>>x>>y;
        if (t=='F')
        {
            swap(x, y);
            int st=s.lower_bound(1, n+1, 1, x), lst=st+y-1;
            //cout<<"here"<<' '<<st<<' '<<lst<<'\n';
            if (lst>=n) s.update(1, n+1, 1, st, n);
            else
            {
                int lvl=s.query(1, n+1, 1, lst), pv=s.lower_bound(1, n+1, 1, lvl)-1, sv=s.lower_bound(1, n+1, 1, lvl+1)-1;
                int nd=lst-pv;
                if (nd>=y) s.update(1, n+1, 1, sv-nd+1, sv);
                else s.update(1, n+1, 1, sv-nd+1, sv), s.update(1, n+1, 1, st, st+y-nd-1);
            }
            //s.show();
        }
        else
        {
            //cout<<"query"<<' '<<s.lower_bound(1, n+1, 1, y+1)<<' '<<s.lower_bound(1, n+1, 1, x)<<'\n';
            cout<<(s.lower_bound(1, n+1, 1, y+1)-s.lower_bound(1, n+1, 1, x))<<'\n';
        }
    }
}

/*
5 1
1 3 2 5 2
F 2 1
*/
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