제출 #919725

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
919725		JakobZorz	서열 (APIO23_sequence)	C++17	0 / 100	2036 ms	35408 KiB

sequence

#include"sequence.h"
#include<vector>
#include<iostream>
using namespace std;

int n;
int arr2[500000];
int tree[500001];
vector<int>arr[500000];

int sequence(int N,vector<int>A){
    n=N;
    for(int i=0;i<n;i++){
        arr[A[i]-1].push_back(i);
        arr2[i]=A[i]-1;
    }
    for(int i=0;i<=n;i++)
        tree[i]=-i;
    
    int res=0;
    for(int v=0;v<n;v++){
        for(int idx=0;idx<(int)arr[v].size();idx++){
            for(int i=arr[v][idx]+1;i<=n;i++)
                tree[i]+=2;
            int min2=1e9;
            int max2=-1e9;
            for(int i=arr[v][idx];i<=n;i++){
                int sum=tree[i];
                min2=min(min2,sum);
                max2=max(max2,sum);
            }
            
            int min1=1e9;
            int max1=-1e9;
            for(int i=0;i<arr[v][idx];i++){
                int sum=tree[i];
                min1=min(min1,sum);
                max1=max(max1,sum);
                //cout<<min1<<" "<<max1<<", "<<min2<<" "<<max2<<"\n";
                if(max1<min2-1||max2<min1)
                    continue;
                int i2=0;
                while(arr[v][i2]<i)
                    i2++;
                res=max(res,idx-i2+1);
                break;
            }
            
            /*for(int i=0;i<n;i++){
                int num=0;
                for(int j=i;j<n;j++){
                    if(arr2[j]==v)
                        num++;
                    int sum=tree2[j+1]-tree2[i];
                    if(sum==0||sum==1)
                        res=max(res,num);
                }
            }*/
        }
    }
    
    return res;
}

• Subtask 1: 0 / 11
• Subtask 2: 0 / 17
• Subtask 3: 0 / 7
• Subtask 4: 0 / 12
• Subtask 5: 0 / 13
• Subtask 6: 0 / 22
• Subtask 7: 0 / 18