‹ The Blind 75 · Strings
Valid Parentheses
Say whether every bracket in s is closed by the right kind, in the right order.
Three trials
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0 of 1 stars
1 · Recall
Fill single lines: a condition, an update, a return.
Worth 10 XP
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0 of 1 stars
2 · Rebuild
Rebuild a block, most often a loop body.
Worth 20 XP
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0 of 1 stars
3 · Write
Write the whole function body, with the tests as a net.
Worth 40 XP