Main.cc: In function ‘int main()’:
Main.cc:28:30: error: too many arguments to function ‘void ignore_ret()’
ignore_ret(scanf("%d",&n));
^
Main.cc:2:20: note: declared here
static inline void ignore_ret() {}
^~~~~~~~~~
Main.cc:29:30: error: too many arguments to function ‘void ignore_ret()’
ignore_ret(scanf("%d",&k));
^
Main.cc:2:20: note: declared here
static inline void ignore_ret() {}
^~~~~~~~~~
Main.cc:32:12: error: ‘unused’ was not declared in this scope
unused = scanf("%d",&a[i]);
^~~~~~