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QOJ
			Time Limit:
			10.0 s		
				Memory Limit:
			1024 MB		
				Total points:
			100		
						
			Difficulty: 
			[show]
			
		
		
								
		Hackable ✓
	
#7007. Rikka with Data Structures
统计
			该题目在以下比赛中使用过:
					
			
			This problem is prepared by 
tangjz			.