Java Solution - O(N)
\nclass Solution {\n    public int smallestEqual(int[] nums) {\n        for (int i = 0; i < nums.length; i++) {\n            if (i % 10 == nums[i]) {\n         
```\nclass Solution {\n    public int smallestEqual(int[] nums) {\n        for (int i = 0; i < nums.length; i++) {\n            if (i % 10 == nums[i]) {\n                return i;\n            }\n        }\n        return -1;\n    }\n}\n```
['Java']