Solve Problems
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Empty arrays
ATTEMPTED BY: 1960 SUCCESS RATE: 68% LEVEL: Easy
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Holiday decorations
ATTEMPTED BY: 350 SUCCESS RATE: 86% LEVEL: Hard
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Disk tower
ATTEMPTED BY: 4425 SUCCESS RATE: 85% LEVEL: Easy
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Number Recovery
ATTEMPTED BY: 713 SUCCESS RATE: 58% LEVEL: Medium