/in/foo.cc: In function 'int main()':
/in/foo.cc:92:25: warning: 'ans' may be used uninitialized in this function [-Wmaybe-uninitialized]
  printf("%d %d",tmp,ans);
                         ^
/in/foo.cc:92:25: warning: 'tmp' may be used uninitialized in this function [-Wmaybe-uninitialized]