Techniqueintro
Difference array
Also called Imos method, delta array, difference sequence.
Store d[i]=a[i]-a[i-1]; a range add becomes two point updates, and one prefix-sum pass recovers the array.
Store d[i]=a[i]-a[i-1]; a range add becomes two point updates, and one prefix-sum pass recovers the array.
About this page
The build computes these levels from the evidence in the repository. Each row says what the next level needs. Read what the levels mean.
| Ladder | Level | What the next level needs |
|---|---|---|
| Human proof | H0 no proof |
|
| Lean | L0 no Lean part |
|
| Visual | V0 none |
|
| Writing | W0 stub |
|
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