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漫画：什么是动态规划？
source link: https://juejin.im/post/5a29d52cf265da43333e4da7
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————————————题目：有一座高度是10级台阶的楼梯，从下往上走，每跨一步只能向上1级或者2级台阶。要求用程序来求出一共有多少种走法。比如，每次走1级台阶，一共走10步，这是其中一种走法。我们可以简写成 1,1,1,1,1,1,1,1,1,1。再比如，
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