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查来查去查了一年,还是不知道哪里错了!!#include<iostream>
using namespace std;
#define N 2000
char rec[N][N],str1[N],str2[N];
int LCS()
{
int l1,l2,i,j;
l1=strlen(str1);
l2=strlen(str2);
memset(rec,0,sizeof(rec));
for(i=1;i<=l1;i++)
{
for(j=1;j<=l2;j++){
if(str1[i-1]==str2[j-1])
rec[i][j]=rec[i-1][j-1]+1;
else if(rec[i][j-1]<rec[i-1][j])
rec[i][j]=rec[i-1][j];
else rec[i][j]=rec[i][j-1];
}
}
return rec[l1][l2];
}
int main()
{
while(scanf("%s %s",str1,str2)!=EOF)
printf("%d\n",LCS());
return 0;
}
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