Wrong Answer
/in/foo.cc: In function 'int main()':
/in/foo.cc:67:14: warning: variable 'z' set but not used [-Wunused-but-set-variable]
for(int x,y,z,i=1;i<=num;i++)
^
/in/foo.cc: In function 'int main()':
/in/foo.cc:67:14: warning: variable 'z' set but not used [-Wunused-but-set-variable]
for(int x,y,z,i=1;i<=num;i++)
^
