View Compilation Error

0_0_26417034_29171.cpp: In function 'int main()':
0_0_26417034_29171.cpp:14:25: error: 'memset' was not declared in this scope
   memset(dp,0,sizeof(dp));
                         ^
0_0_26417034_29171.cpp:15:8: error: 'b' was not declared in this scope
   a[0]=b[0]=1;
        ^
0_0_26417034_29171.cpp:16:9: error: cannot convert 'char (*)[2600]' to 'char*' for argument '1' to 'char* gets(char*)'
   gets(a);
         ^
0_0_26417034_29171.cpp:18:22: error: 'strlen' was not declared in this scope
   int lena = strlen(a)-1;
                      ^
0_0_26417034_29171.cpp:37:23: error: invalid types 'bool [2600][bool [2600]]' for array subscript
   if(dp[lenb][dp[lena]])
                       ^