C Solution
IntuitionApproachComplexity
Time complexity:

Space complexity:
Code
# Intuition
<!-- Describe your first thoughts on how to solve this problem. -->

# Approach
<!-- Describe your approach to solving the problem. -->

# Complexity
- Time complexity:
<!-- Add your time complexity here, e.g. $$O(n)$$ -->

- Space complexity:
<!-- Add your space complexity here, e.g. $$O(n)$$ -->

# Code
```c []
int smallestNumber(int n) {
    int num = n, temp = 0, count = 0;
    while(n > 0){
        n = n >> 1;
        count++;
    }
    temp = (1 << count) - 1;
    return num | temp;
} 
```
['C']