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![[Eng] Leetcode Biweekly Contest 107 | 2746 Decremental String Concatenation](/_next/image?url=https%3A%2F%2Fi.ytimg.com%2Fvi%2FF3omF8CtHLU%2Fhq720.jpg%3Fsqp%3D-oaymwExCNAFEJQDSFryq4qpAyMIARUAAIhCGAHwAQH4Af4JgAKIBYoCDAgAEAEYfyATKBUwDw%3D%3D%26rs%3DAOn4CLD2R9hyJkNP7cwp8DnZBd3XYKaCsg&w=256&q=75)
