最长公共上升子序列(LCIS)ZOJ 2432

来源：互联网发布：22的丝大烟雾绕丝数据编辑：程序博客网时间：2024/05/13 05:20

立方算法:

#include<cstdio>#include<iostream>#include<algorithm>#include<cstring>#define M 505using namespace std;typedef long long LL;LL a[M],b[M];int dp[M][M];int main(){    //freopen("in.txt","r",stdin);    int T;    cin>>T;    while(T--)    {        int n1,n2;        cin>>n1;        for(int i=1; i<=n1; i++)cin>>a[i];        cin>>n2;        for(int i=1; i<=n2; i++)cin>>b[i];        memset(dp,0,sizeof(dp));        for(int i=1; i<=n1; i++)        {            for(int j=1; j<=n2; j++)            {                dp[i][j]=dp[i-1][j];                if(a[i]==b[j])dp[i][j]=1;                if(a[i]==b[j])for(int k=1; k<j; k++)                {                    if(b[j]>b[k])dp[i][j]=max(dp[i][j],dp[i][k]+1);                }            }        }        int ans=0;        for(int j=1;j<=n2;j++)if(dp[n1][j]>ans)        {            ans=dp[n1][j];        }        cout<<ans<<endl;        if(T)cout<<endl;    }    return 0;}

平方算法:

#include<cstdio>#include<iostream>#include<algorithm>#include<cstring>#define M 505using namespace std;typedef long long LL;LL a[M],b[M];int dp[M][M];int main(){    //freopen("in.txt","r",stdin);    int T;    cin>>T;    while(T--)    {        int n1,n2;        cin>>n1;        for(int i=1; i<=n1; i++)cin>>a[i];        cin>>n2;        for(int i=1; i<=n2; i++)cin>>b[i];        memset(dp,0,sizeof(dp));        for(int i=1; i<=n1; i++)        {            int max_=0;            for(int j=1; j<=n2; j++)            {                dp[i][j]=dp[i-1][j];                if(a[i]>b[j]&&dp[i][j]>max_)max_=dp[i][j];                else if(a[i]==b[j])dp[i][j]=max_+1;            }        }        int ans=0;        for(int i=1; i<=n2; i++)ans=max(ans,dp[n1][i]);        cout<<ans<<endl;        if(T)cout<<endl;    }    return 0;}

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