/in/foo.cc: In function 'int main()':
/in/foo.cc:16:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int j=0;j<a.length()-b.length()+1;j++)
                ^
/in/foo.cc:18:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for(int k=0;k<b.length();k++)
                 ^
/in/foo.cc:26:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     else if(k==b.length()-1)
              ^
/in/foo.cc:13:7: warning: unused variable 'p' [-Wunused-variable]
   int p=0;
       ^