/in/foo.cc: In function 'int main()':
/in/foo.cc:17:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int i=0;i<str.length();i++)
                  ~^~~~~~~~~~~~~
/in/foo.cc:21:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
             for (j=0,k=i;j<s0.length();j++,k++)
                          ~^~~~~~~~~~~~
/in/foo.cc:24:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
             if(j == s0.length()&&(k==str.length()||str[k]==' '))
                ~~^~~~~~~~~~~~~~
/in/foo.cc:24:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
             if(j == s0.length()&&(k==str.length()||str[k]==' '))
                                   ~^~~~~~~~~~~~~~
/in/foo.cc:32:25: warning: 'p' may be used uninitialized in this function [-Wmaybe-uninitialized]
         cout<<ans<<" "<<p<<endl;
                         ^