hdu1159

http://acm.hdu.edu.cn/showproblem.php?pid=1159

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      #include
    
      "
    
      iostream
    
      "
    
      

    
      using
    
       
    
      namespace
    
       std;

    
      char
    
       a[
    
      1001
    
      ],b[
    
      1001
    
      ];

    
      int
    
       c[
    
      1001
    
      ][
    
      1001
    
      ];

    
      int
    
       Max(
    
      int
    
       a, 
    
      int
    
       b)
{
 
    
      return
    
       a
    
      >
    
      b
    
      ?
    
      a:b;
}

    
      void
    
       LCS(
    
      char
    
       
    
      *
    
      aa , 
    
      char
    
       
    
      *
    
      bb, 
    
      int
    
       x, 
    
      int
    
       y)
{
 
    
      int
    
       i,j;
 
    
      for
    
      (i
    
      =
    
      0
    
      ;i
    
      <=
    
      x;i
    
      ++
    
      )
 c[i][
    
      0
    
      ]
    
      =
    
      0
    
      ;
 
    
      for
    
      (j
    
      =
    
      0
    
      ;j
    
      <=
    
      y;j
    
      ++
    
      ) c[
    
      0
    
      ][j]
    
      =
    
      0
    
      ;
 
 
    
      for
    
      (i
    
      =
    
      1
    
      ;i
    
      <=
    
      x;i
    
      ++
    
      )
 {
 
    
      for
    
      (j
    
      =
    
      1
    
      ;j
    
      <=
    
      y;j
    
      ++
    
      )
 {
 
    
      if
    
      (aa[i
    
      -
    
      1
    
      ]
    
      ==
    
      bb[j
    
      -
    
      1
    
      ]) {c[i][j]
    
      =
    
      c[i
    
      -
    
      1
    
      ][j
    
      -
    
      1
    
      ]
    
      +
    
      1
    
      ;}
 
    
      else
    
       c[i][j]
    
      =
    
      Max(c[i
    
      -
    
      1
    
      ][j],c[i][j
    
      -
    
      1
    
      ]);
 } 
 }
}

    
      int
    
       main()
{
 
 
    
      while
    
      (cin
    
      >>
    
      a
    
      >>
    
      b)
 {
 
    
      int
    
       La
    
      =
    
      strlen(a);
 
    
      int
    
       Lb
    
      =
    
      strlen(b);
 LCS(a,b,La,Lb);
 
 cout
    
      <<
    
      c[La][Lb]
    
      <<
    
      endl;
 }
 
    
      return
    
       
    
      0
    
      ;
}