/in/foo.cc: In function 'long long int gcd(long long int, long long int)':
/in/foo.cc:7:2: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
  if(!y) return x;return gcd(y,x%y);
  ^~
/in/foo.cc:7:18: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if'
  if(!y) return x;return gcd(y,x%y);
                  ^~~~~~