Problem Description Some days ago, I learned the concept of LCM (least common multiple). I've played with it for several times and I want to make a big number with it. But I also don't want to use many numbers, so I'll choose three positive integers…
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A - LCM Challenge Time Limit: 2000/1000MS (Java/Others)    Memory Limit: 128000/64000KB (Java/Others) Submit Status Problem Description Some days ago, I learned the concept of LCM (least common multiple). I've played with it for several times and I w…
题目链接:http://lightoj.com/volume_showproblem.php?problem=1215 题意:已知三个数a b c 的最小公倍数是 L ,现在告诉你 a b  L 求最小的 c ; 其实就是告诉你(最小公倍数LCM)LCM(x, y) = L 已知 x 和 L 求 最小的 y ; L = LCM(x, y)=x*y/gcd(x, y);如果把x,y,L写成素因子之积的方式会很容易发现 L 就是 x 和 y 中素因子指数较大的那些数之积; 例如LCM(24, y)…
 LCM Challenge Time Limit:1000MS     Memory Limit:64000KB     64bit IO Format:%lld & %llu Submit Status Practice ACdream 1077 Description Some days ago, I learned the concept of LCM (least common multiple). I've played with it for several times and I…
[codeforces 235]A. LCM Challenge 试题描述 Some days ago, I learned the concept of LCM (least common multiple). I've played with it for several times and I want to make a big number with it. But I also don't want to use many numbers, so I'll choose three…
A. LCM Challenge 题目连接: http://www.codeforces.com/contest/235/problem/A Description Some days ago, I learned the concept of LCM (least common multiple). I've played with it for several times and I want to make a big number with it. But I also don't wa…
LCM Challenge Time Limit: 2000/1000MS (Java/Others)    Memory Limit: 128000/64000KB (Java/Others) Submit Status Problem Description Some days ago, I learned the concept of LCM (least common multiple). I've played with it for several times and I want…
这题好毒瘤啊 (特别是long long的坑,调了半天没调好!!)先将你特判一下小于3的话直接输出就是惹,不是的话就判断一下它能不能被2整除如果不能就直接输出n*(n-1)*(n-2)否则进行枚举枚举核心代码: LL sum=0; sum=i*j/gcd(i,j); sum=sum*k/gcd(sum,k); ans=max(ans,sum); 求三个数的最小公倍数. #include<bits/stdc++.h> using namespace std; typedef long long…
找到3个不超过n的正整数(可以相同),使得它们的lcm(最小公倍数)最大. Solution 可以做得很优雅吧,但我喜欢(只会)暴力一点 根据质数密度分布性质,最后所取的这三个数一定不会比 \(n\) 小太多(实在不行就取三个质数呀),所以我们钦定一个界,然后暴力枚举取最优即可 #include <bits/stdc++.h> using namespace std; #define int long long int n; signed main() { cin>>n; int…