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Given an array * ‘arr’* of size

Example:

```
Input: 'n' = 5, 'arr' = [1, 2, 3, 4, 5]
Output: 5
Explanation: From the array {1, 2, 3, 4, 5}, the largest element is 5.
```

Detailed explanation

```
6
4 7 8 6 7 6
```

```
8
```

```
The answer is 8.
From {4 7 8 6 7 6}, 8 is the largest element.
```

```
8
5 9 3 4 8 4 3 10
```

```
10
```

```
O(n), Where ‘n’ is the size of an input array ‘arr’.
```

```
1 <= 'n' <= 10^5
1 <= 'arr[i]' <= 10^9
Time Limit: 1 sec
```