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  1. Prepare
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  3. Advanced
  4. Java Singleton Pattern
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Java Singleton Pattern

Hacker
Rank
Score
becky_g
74877
flag of United States
00.00
bhaku14
74877
flag of India
00.00
Director_X007
74877
flag of India
00.00
Ohcrapitshim
74877
flag of United Kingdom
00.00
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