Track / Stage 4 / 44 of 340 #304 of 1964

$1.19 n+m$ 位由 $m$ 个 $0, n$ 个 1 组成的符号串, 其中 $n \leqslant m+1$, 试问不存在两个 1 相邻的符号串的数目.

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Source: NuminaMath-1.5, licensed Apache-2.0. Statement and solution reproduced as published; topic, difficulty and ordering added by this site.