rokugats https://blog.hatena.ne.jp/rokugats/ ICPC log https://rokugats-pc.hateblo.jp/ POJ 誤差は気にしなくても通るっぽい。やるだけ。 #include <iostream> using namespace std; int main() { double n; while (cin >> n && n != 0) { int ans = 0; while (n > 0) { ans++; n -= 1.0 / (ans + 1); } cout << ans << " card(s)" << endl; } } 190 <iframe src="https://hatenablog-parts.com/embed?url=https%3A%2F%2Frokugats-pc.hateblo.jp%2Fentry%2F2014%2F09%2F28%2F012825" title="POJ PKU 1003 Hangover - ICPC log" 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 2014-09-28 01:28:25 rich https://rokugats-pc.hateblo.jp/entry/2014/09/28/012825 1.0 100%