22 lines
269 B
Rust
22 lines
269 B
Rust
use proconio::input;
|
|
|
|
fn f(n: i64, x: i64) -> i64 {
|
|
if n == -1 {
|
|
0
|
|
} else {
|
|
n / x + 1
|
|
}
|
|
}
|
|
|
|
fn main(){
|
|
input!{
|
|
a: i64,
|
|
b: i64,
|
|
x: i64,
|
|
};
|
|
|
|
let result = f(b, x) - f(a - 1, x);
|
|
|
|
println!("{}", result);
|
|
}
|