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java-interview-lab/sliding-window/output/03-min-window-trace.txt
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Minimum window substring: s="ADOBECODEBANC" t="ABC"
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right=5 'C' window="ADOBEC" is VALID
new best "ADOBEC" (length 6)
drop 'A' -> window="DOBEC" no longer valid, missing=1
right=10 'A' window="DOBECODEBA" is VALID
drop 'D' -> window="OBECODEBA" still valid
drop 'O' -> window="BECODEBA" still valid
drop 'B' -> window="ECODEBA" still valid
drop 'E' -> window="CODEBA" still valid
drop 'C' -> window="ODEBA" no longer valid, missing=1
right=12 'C' window="ODEBANC" is VALID
drop 'O' -> window="DEBANC" still valid
drop 'D' -> window="EBANC" still valid
new best "EBANC" (length 5)
drop 'E' -> window="BANC" still valid
new best "BANC" (length 4)
drop 'B' -> window="ANC" no longer valid, missing=1
answer = "BANC"