Greatest Common Increasing Subsequence
Time Limit : 2000/1000ms (Java/Other) Memory Limit : 65536/32768K (Java/Other)
Total Submission(s) : 5 Accepted Submission(s) : 3
Problem Description
This is a problem from ZOJ 2432.To make it easyer,you just need output the length of the subsequence.
Input
Each sequence is described with M - its length (1 <= M <= 500) and M integer numbers Ai (-2^31 <= Ai < 2^31) - the sequence itself.
Output
output print L - the length of the greatest common increasing subsequence of both sequences.
Sample Input
1 5 1 4 2 5 -12 4 -12 1 2 4
Sample Output
2
Source
ACM暑期集训队练习赛(二)
求两组数据相同的最长的上升子序列,感觉学习DP,根据代码自己在纸上模拟一样过程,可以加深理解
#include<stdio.h>
#include<string.h>
#include<algorithm>
using namespace std;
int dp[1100],m,n,a[1100],b[1100];
int init()
{
int max,i,j;
memset(dp,0,sizeof(dp));
for(i=1;i<=m;i++)
{
max=0;
for(j=1;j<=n;j++)
{
if(a[i]>b[j]&&max<dp[j])
max=dp[j];
if(a[i]==b[j])
dp[j]=max+1;
}
}
max=0;
for(j=1;j<=n;j++)
{
if(max<dp[j])
max=dp[j];
}
return max;
}
int main()
{
int i,j,t;
scanf("%d",&t);
while(t--)
{
scanf("%d",&m);
for(i=1;i<=m;i++)
scanf("%d",&a[i]);
scanf("%d",&n);
for(i=1;i<=n;i++)
scanf("%d",&b[i]);
printf("%d\n",init());
if(t)
printf("\n");
}
return 0;
}