Rust Counting the bits
Intuition\n Describe your first thoughts on how to solve this problem. \nSince k <= 15, we can only select one number to apply all the operations. \n# Approach\
# Intuition\n<!-- Describe your first thoughts on how to solve this problem. -->\nSince k <= 15, we can only select one number to apply all the operations. \n# Approach\n<!-- Describe your approach to solving the problem. -->\n\n# Complexity\n- Time complexity:\n<!-- Add your time complexity here, e.g. $$O(n)$$ -->\nO(N)\n- Space complexity:\n<!-- Add your space complexity here, e.g. $$O(n)$$ -->\nO(1)\n# Code\n```\nimpl Solution {\n    pub fn maximum_or(nums: Vec<i32>, k: i32) -> i64 {\n        let mut count= vec![0; 32];\n\n        for a in &nums {\n            let (mut a, mut i) = (*a, 0);\n            while a > 0 {\n                count[i] += a % 2;\n                a /= 2;\n                i += 1;\n            }\n        }\n\n        let mut ret = 0;\n\n        for a in nums {\n            let mut t = 0;\n            for i in 0 .. 32 {\n                if count[i] == 0 { continue }\n                if count[i] == 1 && a & (1 << i as i64) > 0 { continue }\n                t |= 1 << (i as i64);\n            }\n            t |= ((a as i64) << (k as i64));   \n            ret = ret.max(t);\n        }\n\n        ret\n    }\n}\n```
['Rust']