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DSA · Theory

Closest greater or same value on left side for every element in array

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Theory

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Closest greater or same value on left side for every element in array

Don’t start Closest greater or same value on left side for every element in array with jargon. Start with a Closest greater or same value on left side for every element in array dry-run. That is the whole point.

Closest greater or same value on left side for every element in array order: meaning → one Closest greater or same value on left side for every element in array step Vikram can write from memory → one limit. Dumping ten features helps nobody.

Skip Closest greater or same value on left side for every element in array and skipping the failure case for Closest greater or same value on left side for every element in array shows up in a campus project.

Use Closest greater or same value on left side for every element in array when a Closest greater or same value on left side for every element in array dry-run must stay clear. If a simpler DSA step works, use that instead.

Closest greater or same value on left side for every element in array miss: skipping the failure case for Closest greater or same value on left side for every element in array. Fix it before you talk about advanced DSA.

Closest greater or same value on left side for every element in array is not a lonely heading. Vikram ties it to a Closest greater or same value on left side for every element in array dry-run.

Viva for Closest greater or same value on left side for every element in array: what it is → one Closest greater or same value on left side for every element in array step Vikram can write from memory → the mistake (skipping the failure case for Closest greater or same value on left side for every element in array).

Diagram
  index →  0    1    2
  array → [10,  20,  30]
Exam tip

Say Closest greater or same value on left side for every element in array in one breath, then one Closest greater or same value on left side for every element in array step Vikram can write from memory, then skipping the failure case for Closest greater or same value on left side for every element in array.

Example

arr = [10, 20, 30, 40]
print(arr[2], arr[-1])
matrix = [[1, 2], [3, 4]]
print(matrix[1][0])  # 3

Closest greater or same value on left side for every element in array — arrays give O(1) index access; matrices are arrays of arrays.

Short notes

  • DefClosest greater or same value on left side for every element in array — Vikram uses it for a Closest greater or same value on left side for every element in array dry-run in a campus project.
  • RuleClosest greater or same value on left side for every element in array → one Closest greater or same value on left side for every element in array step Vikram can write from memory.
  • RememberClosest greater or same value on left side for every element in array + Big-O (a campus project).
  • UseClosest greater or same value on left side for every element in array in a campus project (a Closest greater or same value on left side for every element in array dry-run).
  • TrapClosest greater or same value on left side for every element in array — skipping the failure case for Closest greater or same value on left side for every element in array.
  • ExClosest greater or same value on left side for every element in array → a Closest greater or same value on left side for every element in array dry-run.

Questions

1

In one breath: what does Closest greater or same value on left side for every element in array do for Vikram?

2

Name one DSA screen/job that needs Closest greater or same value on left side for every element in array.

3

Viva: one wrong answer people give for Closest greater or same value on left side for every element in array.

4

Dry-run one Closest greater or same value on left side for every element in array step Vikram can write from memory and say the result.

Previous← Binary Indexed Tree Range Updates and Range QueriesNextConstruct an array from its pair-sum array →
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