/in/foo.cc: In function 'void print()':
/in/foo.cc:40:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
             for(int j=0;j<add[i].size();j++)
                         ~^~~~~~~~~~~~~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:52:11: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
     cin>>s+1>>p+1;
          ~^~
/in/foo.cc:52:16: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
     cin>>s+1>>p+1;
               ~^~