# 22.11.2025 [3190. Find Minimum Operations to Make All Elements Divisible by Three]
Min steps inc/dec to make %3 #easy
22.11.2025
3190. Find Minimum Operations to Make All Elements Divisible by Three easy blog post substack youtube
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Problem TLDR
Min steps inc/dec to make %3 #easy
Intuition
min(x%3, 3-x%3)
Approach
it is actually always min(1,2) = 1
Complexity
Time complexity: $$O(n)$$
Space complexity: $$O(1)$$
Code
// 1ms
fun minimumOperations(n: IntArray) =
n.count { it%3>0 }
// 0ms
pub fn minimum_operations(n: Vec<i32>) -> i32 {
n.iter().filter(|&x| x%3>0).count() as _
}