tozangezan https://blog.hatena.ne.jp/tozangezan/ tozangezan's diary https://tozangezan.hatenablog.com/ TopCoder まあ悪くは無いと思います。525だけあってMedium525点だったし。300:BallsOfWolf 累積和でもとってみた。O(N^3M^3)でも間に合う。 import java.util.*; public class DropCoins{ public int getMinimum(String[]a,int b){ int sum[][]=new int[a.length+1][a[0].length()+1]; for(int i=1;i<=a.length;i++){ for(int j=1;j<=a[0].length();j++){ if(a[i-1].charAt(j-1)… 190 <iframe src="https://hatenablog-parts.com/embed?url=https%3A%2F%2Ftozangezan.hatenablog.com%2Fentry%2F20111129%2F1322575392" title="SRM 525 Div1 - tozangezan&#39;s diary" 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 2011-11-29 23:03:12 rich https://tozangezan.hatenablog.com/entry/20111129/1322575392 1.0 100%