I have no idea why I pass all test cases and fail on validator 3.

My current algorithm works as:

Determine total number of 1s, then go through the input, and add a swap every time a 0 is encountered within the number of 1s.

For example, let input be: 1 0 0 1 1

1s = 3

While looping, at positions 1 and 2,we encounter a 0,so I increment swaps.

∴swaps = 2

if there is anything wrong, please point it out.Any help will be appreciated

Can you give me a step by step detail of your algorithm and I’ll try to help