Submission #1244046

#	Time	Username	Problem	Language	Result	Execution time	Memory
1244046		m5588ohammed	Financial Report (JOI21_financial)	C++20	14 / 100	4096 ms	4424 KiB

Main

#include <bits/stdc++.h>
#define endl "\n"
#define mod 1000000007
using namespace std;
int n,d,arr[300010];
int bigL[300010],bigR[300010],dp[300010];
void stack_trick(){
    vector <int> qu;
    for(int i=1;i<=n;i++){
        while(!qu.empty()&&arr[qu.back()]<=arr[i]){ qu.pop_back();}
        if(qu.size()==0) bigL[i]=0;
        else bigL[i]=qu.back();
        qu.push_back(i);
    }
    qu.clear();
    for(int i=n;i>=1;i--){
        while(!qu.empty()&&arr[qu.back()]<=arr[i]){ qu.pop_back();}
        if(qu.size()==0) bigR[i]=n+1;
        else bigR[i]=qu.back();
        qu.push_back(i);
    }
    qu.clear();
}
signed main(){
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
    cin>>n>>d;
    for(int i=1;i<=n;i++) cin>>arr[i];
    stack_trick();
    int ans=0;
    for(int i=1;i<=n;i++){
        dp[i]=1;
        for(int j=1;j<i;j++){
            if(arr[i]<=arr[j]||bigL[i]-bigR[j]>=d-1) continue;
            dp[i]=max(dp[i],dp[j]+1);
            //cout<<j<<" "<<i<<endl;
        }
        //cout<<arr[i]<<" "<<dp[i]<<endl;
        ans=max(ans,dp[i]);
    }
    cout<<ans<<endl;
}

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