Main.cc: In function 'int main()':
Main.cc:6:11: error: expected primary-expression before '%' token
scanf(%lld a,b)
^
Main.cc:6:12: error: 'lld' was not declared in this scope
scanf(%lld a,b)
^
Main.cc:5:15: warning: unused variable 'a' [-Wunused-variable]
long long a,b;
^