27 lines
836 B
Rust
27 lines
836 B
Rust
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struct Solution;
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impl Solution {
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pub fn maximum_or(nums: Vec<i32>, k: i32) -> i64 {
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let n = nums.len();
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let k = k as i64;
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let mut pa = vec![0;n+1];
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for i in 1..=n {
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pa[i] = pa[i-1] | nums[i-1] as i64;
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}
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let mut sa = vec![0;n+1];
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for i in (0..n).rev() {
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sa[i] = sa[i+1] | nums[i] as i64;
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}
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(0..n).fold(0, |res, i|res.max((nums[i] as i64) <<k | pa[i] | sa[i+1]))
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}
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}
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fn main() {
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let mut buf = String::new();
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std::io::stdin().read_line(&mut buf).ok();
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let nums: Vec<i32> = buf.trim().split(' ').map(|x|x.parse::<i32>().unwrap()).collect::<Vec<i32>>();
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buf.clear();
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std::io::stdin().read_line(&mut buf).ok();
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let k: i32 = buf.trim().parse::<i32>().unwrap();
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println!("{}", Solution::maximum_or(nums, k));
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}
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