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Task: Express.js calculator computes arithmetic mean of two numbers, requiring result > 1000 while inputs must be 1-1000. Solution: JavaScript type confusion — hex literal '0x1000' passes range validation but evaluates to 4096 in computation, producing average > 1000.

$ ls tags/ techniques/
nodejsjavascripttype_confusioninput_validation_bypassexpresscalculatorhex_parsing
javascript_type_confusioninconsistent_number_parsinghex_literal_validation_bypass
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