/in/foo.cc: In function 'int main()':
/in/foo.cc:22:11: warning: suggest explicit braces to avoid ambiguous 'else' [-Wdangling-else]
         if(iter->second==1)
           ^
/in/foo.cc:30:14: warning: 'b' may be used uninitialized in this function [-Wmaybe-uninitialized]
     cout<<b<<" "<<a;
              ^~~