Carries frog has nn integers a1,a2,-,ana1,a2,-,an, and she wants to add them pairwise. Unfortunately, frog is somehow afraid of carries (进位). She defines hardness h(x,y)h(x,y) for adding xxand yy the number of carries involved in the calculation. For…

SCU 4437  Carries Time Limit:0MS     Memory Limit:0KB     64bit IO Format:%lld & %llu  Practice  Description Carries frog has nn integers a1,a2,…,ana1,a2,…,an, and she wants to add them pairwise. Unfortunately, frog is somehow afraid of carries (进位).…

题意:问任意两对ai,aj相加的总进位数为多少.比如5,6,95分为(5,6)(5,95)(6,95),进位数 = 1 + 2 + 2 = 5 思路:显然暴力是会超时的.我们可以知道总进位数等于每一位进位数之和,所以我们可以把10个位数的进位分开算,每次%10^k,排序后用二分找到刚好的位置,然后算总数. 好像是唯一一次写二分一次A的题. 代码: #include<iostream> #include<algorithm> #include<cstdio> #inclu…

 SCU 4438 Censor Time Limit:0MS     Memory Limit:0KB     64bit IO Format:%lld & %llu  Practice Description Censor frog is now a editor to censor so-called sensitive words (敏感词). She has a long text pp. Her job is relatively simple -- just to find the…

 SCU 4440 Rectangle Time Limit:0MS     Memory Limit:0KB     64bit IO Format:%lld & %llu  Practice Description Rectangle frog has a piece of paper divided into nn rows and mm columns. Today, she would like to draw a rectangle whose perimeter is not gr…

B. Carries Time Limit: 1000ms Memory Limit: 65536KB frog has n integers a1,a2,-,an, and she wants to add them pairwise. Unfortunately, frog is somehow afraid of carries (进位). She defines \emph{hardness} h(x,y) for adding x and y the number of carries…

A - A Time Limit:0MS     Memory Limit:0KB     64bit IO Format:%lld & %llu Submit Status Practice SCU 4424 Description Time Limit: 1000ms Description Given N distinct elements, how many permutations we can get from all the possible subset of the eleme…

I NEED A OFFER!     64bit IO Format: %lld & %llu Submit Status Description Description Speakless很早就想出国,现在他已经考完了所有需要的考试,准备了所有要准备的材料, 于是,便需要去申请学校了.要申请国外的任何大学,你都要交纳一定的申请费用, 这可是很惊人的.Speakless没有多少钱,总共只攒了n万美元.他将在m个学校中选择若干的 (当然要在他的经济承受范围内).每个学校都有不同的申请费用a(万美…

SCU - 4440 Rectangle Time Limit: Unknown   Memory Limit: Unknown   64bit IO Format: %lld & %llu Submit Status Description Rectangle frog has a piece of paper divided into n rows and m columns. Today, she would like to draw a rectangle whose perimeter…

4436: Easy Math Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://acm.scu.edu.cn/soj/problem.action?id=4436 Description Given n integers a1,a2,…,an, check if the sum of their square root a1+a2+…+an is a integer. Input The input consists of multiple…