Daily Code Challenge: Count All Index Pairs That Sum to a Target Value

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A new medium-difficulty coding challenge has been posted on the IWTLP platform as part of its daily streak series. The problem builds on the classic two-sum concept, asking solvers to count how many index pairs (i < j) within an array sum to a given target. Participants are provided a Python starter function and must complete the implementation. The challenge can be attempted directly in the browser without any local setup, and answers are checked instantly on the platform.

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