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[code]
fn swap(a: *i32, b: *i32) {
let temp = *a;
*a = *b;
*b = temp;
}
fn main() -> i32 {
let x = 10;
let y = 20;
swap(&x, &y);
return x - y; // 20 - 10 = 10
}
[expected_return_code]
10