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feat(viz): interactive algorithm viz system

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This commit is contained in:
Kai Chappell
2025-08-23 20:28:22 +01:00
parent 5fa210cc8e
commit f33dddfb4c
17 changed files with 1321 additions and 1 deletions
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113
backend/data/patterns/two-pointers.yaml
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@@ -164,3 +164,116 @@ related_patterns:
- binary-search
prerequisite_patterns: []
visualization_examples:
- id: "find-pair-sum"
title: "Find pair with sum = 10"
input:
array: [1, 2, 4, 6, 8, 10]
target: 10
code: |
left, right = 0, len(arr) - 1
while left < right:
curr = arr[left] + arr[right]
if curr == target:
return [left, right]
elif curr < target:
left += 1
else:
right -= 1
steps:
- id: "1"
description: "Initialize pointers at both ends of the sorted array. Left starts at index 0 (value 1), right starts at index 5 (value 10)."
structures:
array:
type: array
values:
- { value: 1, state: active, annotations: ["L"] }
- { value: 2, state: default }
- { value: 4, state: default }
- { value: 6, state: default }
- { value: 8, state: default }
- { value: 10, state: active, annotations: ["R"] }
pointers: { left: 0, right: 5 }
variables: { left: 0, right: 5, target: 10 }
codeHighlight: { startLine: 1, endLine: 1 }
- id: "2"
description: "Calculate current sum: 1 + 10 = 11. This is greater than target (10), so we need a smaller sum. Move right pointer left."
structures:
array:
type: array
values:
- { value: 1, state: comparing, annotations: ["L"] }
- { value: 2, state: default }
- { value: 4, state: default }
- { value: 6, state: default }
- { value: 8, state: default }
- { value: 10, state: comparing, annotations: ["R"] }
pointers: { left: 0, right: 5 }
variables: { left: 0, right: 5, curr: 11, target: 10 }
codeHighlight: { startLine: 3, endLine: 8 }
- id: "3"
description: "Right pointer moved to index 4 (value 8). Now checking new sum."
structures:
array:
type: array
values:
- { value: 1, state: active, annotations: ["L"] }
- { value: 2, state: default }
- { value: 4, state: default }
- { value: 6, state: default }
- { value: 8, state: active, annotations: ["R"] }
- { value: 10, state: visited }
pointers: { left: 0, right: 4 }
variables: { left: 0, right: 4, target: 10 }
codeHighlight: { startLine: 8, endLine: 8 }
- id: "4"
description: "Calculate current sum: 1 + 8 = 9. This is less than target (10), so we need a larger sum. Move left pointer right."
structures:
array:
type: array
values:
- { value: 1, state: comparing, annotations: ["L"] }
- { value: 2, state: default }
- { value: 4, state: default }
- { value: 6, state: default }
- { value: 8, state: comparing, annotations: ["R"] }
- { value: 10, state: visited }
pointers: { left: 0, right: 4 }
variables: { left: 0, right: 4, curr: 9, target: 10 }
codeHighlight: { startLine: 3, endLine: 7 }
- id: "5"
description: "Left pointer moved to index 1 (value 2). Now checking new sum."
structures:
array:
type: array
values:
- { value: 1, state: visited }
- { value: 2, state: active, annotations: ["L"] }
- { value: 4, state: default }
- { value: 6, state: default }
- { value: 8, state: active, annotations: ["R"] }
- { value: 10, state: visited }
pointers: { left: 1, right: 4 }
variables: { left: 1, right: 4, target: 10 }
codeHighlight: { startLine: 7, endLine: 7 }
- id: "6"
description: "Calculate current sum: 2 + 8 = 10. This equals the target! We found our pair at indices [1, 4]."
structures:
array:
type: array
values:
- { value: 1, state: visited }
- { value: 2, state: found, annotations: ["L"] }
- { value: 4, state: default }
- { value: 6, state: default }
- { value: 8, state: found, annotations: ["R"] }
- { value: 10, state: visited }
pointers: { left: 1, right: 4 }
variables: { left: 1, right: 4, curr: 10, target: 10 }
codeHighlight: { startLine: 4, endLine: 5 }