tanakaBox https://blog.hatena.ne.jp/tanakaBox/ ボクノス https://boxnos.hatenablog.com/ Scheme 40問達成！！Problem 53 - Project Euler There are exactly ten ways of selecting three from five, 12345:123, 124, 125, 134, 135, 145, 234, 235, 245, and 345In combinatorics, we use the notation, 5C3 = 10.In general,nCr = n!/r!(n−r)!,where r ≤ n, n! = n×(n−1)×...×3×2×1, and 0! = 1.It is not until n = 23, th… 190 <iframe src="https://hatenablog-parts.com/embed?url=https%3A%2F%2Fboxnos.hatenablog.com%2Fentry%2F20080427%2F1209261829" title=" Problem 53 - 組み合わせ - ボクノス" class="embed-card embed-blogcard" scrolling="no" frameborder="0" style="display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;"></iframe> Hatena Blog https://hatena.blog 2008-04-27 11:03:49 rich https://boxnos.hatenablog.com/entry/20080427/1209261829 1.0 100%