Solve Problems
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Empty arrays
ATTEMPTED BY: 1020 SUCCESS RATE: 62% LEVEL: Easy
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Holiday decorations
ATTEMPTED BY: 137 SUCCESS RATE: 87% LEVEL: Hard
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Disk tower
ATTEMPTED BY: 3200 SUCCESS RATE: 86% LEVEL: Easy
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Number Recovery
ATTEMPTED BY: 491 SUCCESS RATE: 55% LEVEL: Medium