MetaCoding·20 minMembers
Valid Number
Members only
Classic LC 65 — decide whether a string is a valid number (integer, decimal, with optional sign, optional `e`/`E` exponent). Surfaced as the warm-up in a recent E5 phone screen with light wording chan...
SWE
string
parsing
state-machine
medium
Frequency
Single report
Last asked
2026-05-16
Stage
phone-screen
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