Difference Time Limit: 6000/3000 MS (Java/Others) Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 62 Accepted Submission(s): 19 Problem Description Little Ruins is playing a number game, first he chooses two positive integers y an…
题目链接 题意 : 给出一个 x 和 k 问有多少个 y 使得 x = f(y, k) - y .f(y, k) 为 y 中每个位的数的 k 次方之和.x ≥ 0 分析 : f(y, k) - y = x ≥ 0 满足条件的 y 最多不超过 10 位 这个并不知道怎么证.网上有很多结论证明.仔细推敲过后发现都是错的 可能需要手动打表模拟一下吧...... 变化一下式子 x = f(a, k) - a + f(b, k) - b * (1e5) x - f(a, k) + a = f(b, k)…
Little Ruins is playing a number game, first he chooses two positive integers yy and KK and calculates f(y,K)f(y,K), here f(y,K)=∑z in every digits of yzK(f(233,2)=22+32+32=22)f(y,K)=∑z in every digits of yzK(f(233,2)=22+32+32=22) then he gets the re…
题目连接 http://acm.hdu.edu.cn/showproblem.php?pid=4715 Difference Between Primes Description All you know Goldbach conjecture.That is to say, Every even integer greater than 2 can be expressed as the sum of two primes. Today, skywind present a new conje…
Difference of Languages Time Limit: 1000ms Memory Limit: 32768KB This problem will be judged on HDU. Original ID: 548764-bit integer IO format: %I64d Java class name: Main A regular language can be represented as a deterministic finite automaton…