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Positional-Only Arguments

The / symbol is used to make parameters positional-only. We must pass values based on their position. We cannot use keyword arguments. Example: def calculate(a, b, /): print(a + b) calculate(10, 20) Output: 30 Here: / is a positional-only separator. We must pass arguments by position. calculate(a=10, b=20) This gives a TypeError because keyword arguments are not allowed for these parameters.

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Keyword-Only Arguments

The * symbol is used to make parameters keyword-only. We must pass values using parameter names. Example: def calculate(a, *, b): print(a + b) calculate(a=10, b=20) Output: 30 Here: is a keyword-only…

3420. Count Non-Decreasing Subarrays After K Operations

3420. Count Non-Decreasing Subarrays After K Operations Difficulty: Hard Topics: Principal , Array , Stack , Segment Tree , Queue , Sliding Window , Monotonic Stack , Monotonic Queue , Weekly Contest…

  • Count non-decreasing subarrays after k operations on array.
  • Use monotonic deque to track prefix maximum block starts.
  • Absorb blocks with max ≤ current element; shrink window if cost > k.

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