fn main() {
let foo = add(1, 2);
println!("Hello, world!");
println!("{foo}");
}
pub fn add(a: i32, b: i32) -> i64 {
(a + b) as i64
}
pub fn sub(a: i32, b: i32) -> i64 {
(a - b) as i64
}
pub fn mul(a: i32, b: i32) -> i64 {
(a * b) as i64
}
pub fn div(a: i32, b: i32) -> i64 {
(a / b) as i64
}