Submission #967653

#	Time	Username	Problem	Language	Result	Execution time	Memory
967653		vjudge1	Financial Report (JOI21_financial)	C++17	5 / 100	148 ms	13992 KiB

Main

#include <bits/stdc++.h>
#define getbit(i, j) ((i >> j) & 1)
#define maxn 300005
#define name "main"
using namespace std;

mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());

long long GetRandom(long long l, long long r)
{
    return uniform_int_distribution<long long> (l, r)(rng);
}

int n,d,a[maxn],st[maxn*4],dp[maxn],dem[maxn],sl,res;
pair<int,int> b[maxn];

void update(int id,int l,int r,int vt,int val)
{
    if(l>vt||r<vt) return;
    if(l==r)
    {
        st[id]=val;
        return;
    }
    int mid=(l+r)/2;
    update(id*2,l,mid,vt,val);
    update(id*2+1,mid+1,r,vt,val);
    st[id]=max(st[id*2],st[id*2+1]);
}

int get(int id,int l,int r,int d,int c)
{
    if(l>c||r<d) return 0;
    if(l>=d&&r<=c) return st[id];
    int mid=(l+r)/2;
    return max(get(id*2,l,mid,d,c),get(id*2+1,mid+1,r,d,c));
}

signed main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
    if(fopen(name".inp","r"))
    {
        freopen(name".inp","r",stdin);
        freopen(name".out","w",stdout);
    }
    cin >> n >> d;
    for(int i=1;i<=n;i++)
    {
        cin >> a[i];
        b[i]={a[i],i};
    }
    sort(b+1,b+n+1);
    sl=1;
    a[b[1].second]=sl;
    for(int i=2;i<=n;i++)
    {
        if(b[i].first>b[i-1].first) sl++;
        a[b[i].second]=sl;
    }
    int vt=1;
    for(int i=1;i<=n;i++)
    {
        while(vt<i-d)
        {
            dem[a[vt]]--;
            if(dem[a[vt]]==0) update(1,1,sl,a[vt],0);
            vt++;
        }
        dp[i]=get(1,1,sl,1,a[i]-1)+1;
        dem[a[i]]++;
        res=max(res,dp[i]);
        update(1,1,sl,a[i],dp[i]);
    }
    cout<<res;
}

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:46:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   46 |         freopen(name".inp","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
Main.cpp:47:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   47 |         freopen(name".out","w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 14
• Subtask 2: 0 / 14
• Subtask 3: 0 / 20
• Subtask 4: 0 / 12
• Subtask 5: 5 / 5
• Subtask 6: 0 / 35