Takefumi Yamamura's blog

This blog is for my memorandum about programming and English.

Happy Coding

This blog is for my memorandum


Build Order

problem You are given a list of projects and a list of dependencies ( which is a list of pairs of projects, where the second project is dependent on the first project). All of a project’s dependencies must be built before the project is. F…

Sparse Search

problem Given a sorted array of strings that is interspersed with empty strings, write a method to find the location of a given string. how to solve If it were not for the empty strings, we could simply use binary search. With empty string…

Group Anagrams

problem Write a method to sort an array of strings so that all the anagrams are next to each other. how to solve I use hash table. once we have grouped all the words into these lists by anagram. we can then put them back into the array. co…


problem You are given two sorted arrays, A and B, where A has a large enough buffer at the end to hold B. Write a method B into A in sorted order. how to solve In this problem, I can use array A which has a large enough buffer at the end t…

累積和とってソートしてBluteForce AtCoder Regular Contest 035 B - アットコーダー王国のコンテスト事情

問題 arc035.contest.atcoder.jp note ペナルティの小さい順にソートして小さい順にペナルティをうけていけばよい。 コード

merge sort

マージソートの実装 分割統治法と再帰の練習