hdu 5904 LCIS dp

Posted 2020-08-10 xjhz

LCIS

Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)

Problem Description

Alex has two sequences a1,a2,...,an and b1,b2,...,bm. He wants find a longest common subsequence that consists of consecutive values in increasing order.

 

 

Input

There are multiple test cases. The first line of input contains an integer T, indicating the number of test cases. For each test case:

The first line contains two integers n and m (1≤n,m≤100000) -- the length of two sequences. The second line contains n integers: a1,a2,...,an (1≤ai≤106). The third line contains n integers: b1,b2,...,bm (1≤bi≤106).

There are at most 1000 test cases and the sum of n and m does not exceed 2×106.

 

 

Output

For each test case, output the length of longest common subsequence that consists of consecutive values in increasing order.

 

 

Sample Input

3 3 3 1 2 3 3 2 1 10 5 1 23 2 32 4 3 4 5 6 1 1 2 3 4 5 1 1 2 1

 

 

Sample Output

1 5 0

 

 

Source

BestCoder Round #87

#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define pi (4*atan(1.0))
const int N=1e5+10,M=1e6+1010,inf=1e9+10,mod=1e9+7;
const ll INF=1e18+10;
int n,m;
int a[N],b[N];
int dpn[M],dpm[M];
int main()
{
    int T;
    scanf("%d",&T);
    while(T--)
    {
        int ans=0;
        scanf("%d%d",&n,&m);
        for(int i=1;i<=n;i++)
        {
            scanf("%d",&a[i]);
            dpn[a[i]]=max(dpn[a[i]],dpn[a[i]-1]+1);
        }
        for(int i=1;i<=m;i++)
        {
            scanf("%d",&b[i]);
            dpm[b[i]]=max(dpm[b[i]],dpm[b[i]-1]+1);
            ans=max(ans,min(dpm[b[i]],dpn[b[i]]));
        }
        for(int i=1;i<=n;i++)
        dpn[a[i]]=0;
        for(int i=1;i<=m;i++)
        dpm[b[i]]=0;
        printf("%d\n",ans);
    }
}