43 lines
778 B
Rust
43 lines
778 B
Rust
/**
|
|
* [3133] Minimum Array End
|
|
*/
|
|
pub struct Solution {}
|
|
|
|
// submission codes start here
|
|
|
|
impl Solution {
|
|
pub fn min_end(n: i32, x: i32) -> i64 {
|
|
let (n, x) = (n as i64, x as i64);
|
|
let mut result = x;
|
|
|
|
let bit_count = 128 - n.leading_zeros() - x.leading_zeros();
|
|
|
|
let mut pos = 0;
|
|
|
|
for i in 0..bit_count {
|
|
if (result >> i) & 1 == 0 {
|
|
if ((n - 1) >> pos) & 1 == 1 {
|
|
result |= 1 << i;
|
|
}
|
|
|
|
pos += 1;
|
|
}
|
|
}
|
|
|
|
result
|
|
}
|
|
}
|
|
|
|
// submission codes end
|
|
|
|
#[cfg(test)]
|
|
mod tests {
|
|
use super::*;
|
|
|
|
#[test]
|
|
fn test_3133() {
|
|
assert_eq!(6, Solution::min_end(3, 4));
|
|
assert_eq!(15, Solution::min_end(2, 7));
|
|
}
|
|
}
|