diff --git a/c/1480-running-sum-of-1d-array.c b/c/1480-running-sum-of-1d-array.c
new file mode 100644
index 000000000..4dd0142a6
--- /dev/null
+++ b/c/1480-running-sum-of-1d-array.c
@@ -0,0 +1,20 @@
+/**
+ * Given an array nums. We define a running sum of an array as
+ * runningSum[i] = sum(nums[0]…nums[i]).
+ *
+ * Return the running sum of nums.
+ *
+ * Time: O(n)
+ * Space: O(n)
+ */
+
+int* runningSum(int* nums, int numsSize, int* returnSize){
+ int *ret = malloc(numsSize * sizeof(int));
+ *returnSize = numsSize;
+
+ for (int i = 0; i < numsSize; i++) {
+ ret[i] = i ? nums[i] + ret[i-1] : nums[i];
+ }
+
+ return ret;
+}
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