# leetle

## 13. Running Sum

95%

Write a function `solve` that returns the running sum of a list. The running sum is the sum of all elements up to each index.

**Example:** `Input: [1,2,3,4]` `Output: [1,3,6,10]`

Make sure you `return` your solution, don't print!

```python
def solve(nums):
    pass
```