Minimum Window Substring, two ways

Try:
CALL
1 / 1

Code

The highlighted line runs next. The pill shows the live values in the running call.

Cost

Work done so far, and how the two solutions compare

The strings

Underlined letters occur in t; green window = covers t

Keyboard: ← → step, Space play or pause. s is 1 to 14 letters and t is 1 to 6; matching is case-sensitive. The Java sliding window compares Integer counts with equals(), because == on two Integer objects compares references.