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https://www.acmicpc.net/problem/25279BOJ - Treehouse문제 유형: 기하학, 수학, 해시문제 난이도: Gold III시간 제한: 3초메모리 제한: 1024MB 문제Pusheen wants to build a treehouse in the Treehouse forest in Brunnshög in the north of Lund. The treehouse should to be built on a square platform in the treetops, with a tree in each of the four corners. When Pusheen has picked a spot to built the treehouse, trees that are located be..

https://leetcode.com/problems/max-sum-of-a-pair-with-equal-sum-of-digits/description/leetcode - Max Sum of a Pair With Equal Sum of Digits문제 유형: 해시, 그리디문제 난이도: Medium 문제You are given a 0-indexed array nums consisting of positive integers. You can choose two indices i and j, such that i != j, and the sum of digits of the number nums[i] is equal to that of nums[j].Return the maximum value of nums[..

https://codeforces.com/contest/2067/problem/BCodeforces Round 1004(Div.2) - B. Two Large Bags문제 유형: 투 포인터, 그리디, 정렬시간 제한: 1초메모리 제한: 256MB 문제You have two large bags of numbers. Initially, the first bag contains n">n numbers: a1,a2,…,an">a1,a2,…,an, while the second bag is empty. You are allowed to perform the following operations:Choose any number from the first bag and move it to the secon..

https://codeforces.com/contest/2067/problem/ACodeforces Round 1004(Div.2) - A. Adjacent Digit Sums문제 유형: 수학시간 제한: 1초메모리 제한: 256MB 문제You are given two numbers x,y">x,y. You need to determine if there exists an integer n">n such that S(n)=x">S(n)=x, S(n+1)=y">S(n+1)=y.Here, S(a)">S(a) denotes the sum of the digits of the number a">a in the decimal numeral system. 두 정수 x, y를 받습니다. 당신은 S(n) = x, S(n..