Sum of Index
EasyP3Coding
Let N be the length of arr (only the length matters, not the values). For each index i from 0 to N - 1, compute the sum of i + j over every index j from 0 to N - 1. Return the N sums in order. For N = 3 the answer is [3, 6, 9].
Example 1
- Input
- arr = [7,7,7]
- Output
- [3,6,9]
- Why
- i = 0: 0+1+2 = 3. i = 1: 1+2+3 = 6. i = 2: 2+3+4 = 9.
Example 2
- Input
- arr = [1]
- Output
- [0]
Example 3
- Input
- arr = [1,2]
- Output
- [1,3]
Constraints
- 1 <= arr.length <= 10^5
Hints
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Saved automatically
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