Math Problem Statement
a个红球 b个黄球 c个绿球 d个蓝球,同色球间无区别,将它们排成一排,相邻球不同色有多少种排法?其中如果存在a+b+c<d+1是不是无解也就是没法实现相邻球不同色?同理任意三种相加小于剩余一种+1时是不是也是无解?
Solution
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Math Problem Analysis
Mathematical Concepts
Combinatorics
Permutations
Coloring Problems
Formulas
max(a, b, c, d) ≤ (a + b + c + d + 1) / 2
Theorems
Inclusion-Exclusion Principle
Pigeonhole Principle
Suitable Grade Level
University Level (Advanced Combinatorics)
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