Wrong Answer
/in/foo.cc: In function 'int main()':
/in/foo.cc:21:7: warning: variable 'flag' set but not used [-Wunused-but-set-variable]
int flag = 1;
^~~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:21:7: warning: variable 'flag' set but not used [-Wunused-but-set-variable]
int flag = 1;
^~~~
