Submission #608993

#	Time	Username	Problem	Language	Result	Execution time	Memory
608993		kakayoshi	Financial Report (JOI21_financial)	C++17	100 / 100	607 ms	36028 KiB

Main

#include <bits/stdc++.h>
using namespace std;

typedef long long int ll;
typedef pair<int, int> pii;
typedef pair<ll,ll> pll;
typedef pair<int, pair<int,int> > piii;
typedef pair<pair<ll,ll> ,pair<ll, ll> > plll;
typedef vector <ll> vi;
#define forw(i,a,b) for (ll i=a;i<=(b);i++)
#define forb(i,a,b) for (ll i=a;i>=(b);i--)
#define fastIO {ios::sync_with_stdio(false); cin.tie(0); }
#define fi first
#define se second
#define pu push
#define puf push_front
#define pb push_back
#define pof pop_front
#define pob pop_back
#define fr front
#define all(a) a.begin(),a.end()
const ll oo=1e18;
const ll mod=1e9+7;
const int base=31;
const ll maxN=3e5+5;
const int tx[4]={0,1,0,-1};
const int ty[4]={1,0,-1,0};
const ll maxM=maxN*4+5;
const ll block=500;
struct segment
{
    vector <ll> ans;
    vector <ll> date;
    vector <ll> lazy;
    segment(int n)
    {
        ans.assign(4*n+5,0);
        date.assign(4*n+5,0);
        lazy.assign(4*n+5,0);
    }
    void down(int id)
    {
        if (!lazy[id]) return;
        date[id*2]=lazy[id];
        date[id*2+1]=lazy[id];
        lazy[id*2]=lazy[id];
        lazy[id*2+1]=lazy[id];
        lazy[id]=0;
        return;
    }
    void update_ans(int id, int l, int r, int pos, ll val, ll time)
    {
        if (pos<l || r<pos) return;
        if (l==r)
        {
            if (l==pos)
            {
                date[id]=time;
                ans[id]=val;
            }
            return;
        }
        int mid=(l+r)/2;
        down(id);
        update_ans(id*2,l,mid,pos,val,time);
        update_ans(id*2+1,mid+1,r,pos,val,time);
        ans[id]=max(ans[id*2],ans[id*2+1]);
        if (!date[id*2]) date[id]=date[id*2+1];
        else
            if (!date[id*2+1]) date[id]=date[id*2];
            else date[id]=min(date[id*2],date[id*2+1]);
        return;
    }
    void update_date(int id, int l, int r, int u, int v, ll time)
    {
        if (v<l || r<u) return;
        if (u<=l && r<=v)
        {
            date[id]=time;
            lazy[id]=time;
            return;
        }
        down(id);
        int mid=(l+r)/2;
        update_date(id*2,l,mid,u,v,time);
        update_date(id*2+1,mid+1,r,u,v,time);
        if (!date[id*2]) date[id]=date[id*2+1];
        else
            if (!date[id*2+1]) date[id]=date[id*2];
            else date[id]=min(date[id*2],date[id*2+1]);
        return;
    }
    void erase(int id, int l, int r, int time)
    {
        if (!date[id]) return;
        if (date[id]>time || ans[id]==0) return;
        if (l==r)
        {
            ans[id]=0;
            date[id]=0;
            return;
        }
        int mid=(l+r)/2;
        down(id);
        erase(id*2,l,mid,time);
        erase(id*2+1,mid+1,r,time);
        if (!date[id*2]) date[id]=date[id*2+1];
        else
            if (!date[id*2+1]) date[id]=date[id*2];
            else date[id]=min(date[id*2],date[id*2+1]);
        ans[id]=max(ans[id*2],ans[id*2+1]);
        return;
    }
    ll get(int id,int l, int r, int u, int v)
    {
        if (v<l || r<u) return 0;
        if (u<=l && r<=v) return ans[id];
        int mid=(l+r)/2;
        down(id);
        return max(get(id*2,l,mid,u,v),get(id*2+1,mid+1,r,u,v));
    }
};
ll n,d,h[maxN],pos[maxN];
bool cmp(pii a, pii b)
{
    if (a.fi!=b.fi) return a.fi<b.fi;
    return a.se>b.se;
}
void solve()
{
    cin>>n>>d;
    segment seg(n);
    vector <pii> pend;
    forw(i,1,n)
    {
        cin>>h[i];
        pend.pb({h[i],i});
    }
    sort(all(pend),cmp);
    forw(i,0,n-1)
        pos[pend[i].se]=i+1;
    forw(i,1,n)
    {
        if (i-d-1>=1)
            seg.erase(1,1,n,i-d-1);
        int tmp=seg.get(1,1,n,1,pos[i])+1;
        //cout<<pos[i]<<" "<<i<<" "<<tmp<<endl;
        seg.update_ans(1,1,n,pos[i],tmp,i);
        seg.update_date(1,1,n,pos[i]+1,n,i);
    }
    cout<<seg.get(1,1,n,1,n);
    return;
}
int main()
{
    ios::sync_with_stdio(0);
    cin.tie(0);
    //freopen("b.inp","r",stdin);
    //freopen("b.out","w",stdout);
    solve();
    return 0;
}

• Subtask 1: 14 / 14
• Subtask 2: 14 / 14
• Subtask 3: 20 / 20
• Subtask 4: 12 / 12
• Subtask 5: 5 / 5
• Subtask 6: 35 / 35