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Problem of the day

Given two non-decreasing sorted arrays, * ‘A’* and

You must merge these arrays, ‘A’ and ‘B’, into a sorted array without using extra space. Of all the 'N + M' sorted elements, array 'A' should contain the first 'N' elements, and array 'B' should have the last 'M' elements.

```
You must perform the merge operation in place and must not allocate any extra space to merge the two arrays.
```

```
When ‘N’ = 4, ‘A’ = {1, 4, 5, 7} and ‘M’ = 3, ‘B’ = {2, 3, 6}.
We can merge these two arrays into {1, 2, 3, 4, 5, 6, 7} (The elements of ‘A’ are {1, 2, 3, 4} ).
Hence, the answer is {1, 2, 3, 4, 5, 6, 7}.
```

Detailed explanation

```
3 4
1 8 8
2 3 4 5
```

```
1 2 3 4 5 8 8
```

```
We have ‘A’ = {1, 8, 8} and ‘B’ = {2, 3, 4, 5}.
Merging the two arrays results in {1, 2, 3, 4, 5, 8, 8}.
Hence the answer is {1, 2, 3, 4, 5, 8, 8}, where ‘A’ contains {1, 2, 3} and ‘B’ contains {4, 5, 8, 8}.
```

```
4 5
1 1 1 1
2 2 3 3 5
```

```
1 1 1 1 2 2 3 3 5
```

```
1 <= N <= 10^5
1 <= M <= 10^5
0 <= A[i] <= 10^9
0 <= B[i] <= 10^9
The sum of ‘N + M’ over all test cases does not exceed 2 * 10^5.
Time Limit: 1-sec
```