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Last version of LCS Template is wrong. Now it's right.

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Kirigaya Kazuto 2016-08-19 09:44:07 +08:00 committed by GitHub
parent 6399136b4e
commit 38c3397b63
1 changed files with 29 additions and 30 deletions
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21
.ACM-Templates/LCS.cpp
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@ -1,30 +1,29 @@
/// LCS 最长子序列 /// LCS 最长子序列
namespace LCS namespace LCS
{ {
const int MAXLEN_A = 500; const int MAXLEN_A = 512;
const int MAXLEN_B = 500; const int MAXLEN_B = 512;
int dp[MAXLEN_A+5][MAXLEN_B+5]; int dp[MAXLEN_A][MAXLEN_B];
int deal(const char* a,const char* b) int deal(const char* a,const char* b)
{ {
int lena=strlen(a); int lena=strlen(a);
int lenb=strlen(b); int lenb=strlen(b);
for(int i=0;i<lenb;i++) for(int i=0;i<=lenb;i++)
{ {
for(int j=0;j<lena;j++) for(int j=0;j<=lena;j++)
{ {
if(i==0) dp[i][j]=0; if(i==0) dp[i][j]=0;
else if(b[i]==a[j]) else if(j==0) dp[i][j]=0;
else if(b[i-1]==a[j-1])
{ {
if(j!=0) dp[i][j]=dp[i-1][j-1]+1; dp[i][j]=dp[i-1][j-1]+1;
else dp[i][j]=1;
} }
else else
{ {
if(j!=0) dp[i][j]=max(dp[i-1][j],dp[i][j-1]); dp[i][j]=max(dp[i-1][j],dp[i][j-1]);
else dp[i][j]=dp[i-1][j];
} }
} }
} }
return dp[lenb-1][lena-1]; return dp[lenb][lena];
} }
}//End of namespace LCS }//End of namespace LCS