944. Delete Columns to Make Sorted

class Solution {
    public int minDeletionSize(String[] strs) {
        int deletionSize = 0;
        for (int j = 0; j < strs[0].length(); j++) {
            for (int i = 1; i < strs.length; i++) {
                if (strs[i].charAt(j) < strs[i - 1].charAt(j)) {
                    deletionSize++;
                    break;
                }
            }
        }
        return deletionSize;
    }
}

References

944. Delete Columns to Make Sorted