Update README.md

Author: GouravRusiya30

README.md

@@ -91,6 +91,7 @@ Check out ---> [Sample PR](https://github.com/codedecks-in/LeetCode-Solutions/pu
 | 1502 | [Can Make Arithmetic Progression From Sequence](https://leetcode.com/problems/can-make-arithmetic-progression-from-sequence/)     | [Java](./Java/can-make-arithmetic-progression-from-sequence.java) | _O(n)_     | _O(1)_ | Easy       | Array     |      |
 | 122  | [Best Time to buy and sell Stock II](https://leetcode.com/problems/best-time-to-buy-and-sell-stock-ii)       | [Python](./Python/best-time-to-buy-and-sell-stock-ii.py)        | _O(N)_ | _O(1)_ | Medium     | Stocks |      |
 | 119  | [Pascal's Triangle II](https://leetcode.com/problems/pascals-triangle-ii)       | [Python](./Python/pascals-triangle-ii.py)        | _O(N^2)_ | _O(K)_ | Easy     |  |      |
+| 1480  | [Running Sum of 1d Array](https://leetcode.com/problems/running-sum-of-1d-array/)       | [Java](./Java/running-sum-of-1d-array.java)        | _O(N)_ | _O(N)_ | Easy     | Simple sum |      |
 
 
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