/in/foo.cc: In function 'int main()':
/in/foo.cc:16:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(int j=0;j<a.length()-b.length()+1;j++)
                      ^
/in/foo.cc:18:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
             for(int k=0;k<b.length();k++)
                          ^
/in/foo.cc:26:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
                 else if(k==b.length()-1)
                          ^
/in/foo.cc:13:13: warning: unused variable 'p' [-Wunused-variable]
         int p=0;
             ^