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定理如图把一个圆分成n(n≥2)个扇形区域An,现用m(m≥2)种不同颜色为这n个区域染色,要求相邻两个区域Ai与Ai+1颜色不同,则不同的染
The theorem is shown by dividing a circle into n (n≥2) fan-shaped regions An. Now m (m≥2) different colors are used to dye these n regions. It is required that the two adjacent regions Ai and Ai+1 have different colors. Then different dyeing