/in/foo.cc: In function 'long long int getsum()':
/in/foo.cc:18:9: warning: 'ans' may be used uninitialized in this function [-Wmaybe-uninitialized]
  return ans;
         ^~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:29:2: warning: 'ans' may be used uninitialized in this function [-Wmaybe-uninitialized]
  if (ans<=b[1]+b[2])
  ^~