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HDU 4135 Co-prime(容斥+数论)
Co-prime Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 5526 Accepted Submission(s): 2209 Proble ...
分类:其他好文   时间:2017-08-16 23:14:37    阅读次数:252
HDU - 4135 Co-prime(容斥原理)
Question 参考 题意找出[a,b]中与n互质的数的个数分析通常我们求1~n中与n互质的数的个数都是用欧拉函数.但如果n比较大或者是求1~m中与n互质的数的个数等等问题,要想时间效率高的话还是用容斥原理。先对n分解质因数,分别记录每个质因数, 那么所求区间内与某个质因数不互质的个数就是 m/r ...
分类:其他好文   时间:2017-07-30 23:48:04    阅读次数:239
CO-PRIME(初探 莫比乌斯)NYOJ1066(经典)gcd(a,b)=1
CO-PRIME 时间限制:1000 ms | 内存限制:65535 KB 难度:3 描写叙述 This problem is so easy! Can you solve it? You are given a sequence which contains n integers a1,a2……a ...
分类:其他好文   时间:2017-06-10 16:57:36    阅读次数:202
HDU4135(容斥原理)
Co-prime Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 4090 Accepted Submission(s): 1619 Proble ...
分类:其他好文   时间:2016-08-27 15:26:15    阅读次数:150
HDU 4135 Co-prime(容斥原理 + 基础数论)
传送门 Co-primeTime Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 3695    Accepted Submission(s): 1461Problem Description Given a number N, you are as...
分类:其他好文   时间:2016-08-08 12:58:38    阅读次数:156
hdu4135 容斥定理
Co-prime Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 3587 Accepted Submission(s): 1419 Proble ...
分类:其他好文   时间:2016-08-02 23:55:14    阅读次数:190
CodeForces 660A
Description You are given an array of n elements, you must make it a co-prime array in as few moves as possible. In each move you can insert any posit ...
分类:其他好文   时间:2016-07-20 17:47:49    阅读次数:184
hdu4135 Co-prime(容斥)
题目链接:点这里!!!! 题意: 给你一个区间[A,B](1 题解: 1、我们先把x的所有质因子找出来,注意x的最多存在1个质因子大于(sqrt(x)),所以我们可以先预处理出[1,sqrt(1e9)]所有的质数。 2、然后我们把x质因子分解并往下除,最后剩下的要么是1,要么就是大于sqrt(x)的质因子。 3、我们得到的质因子最多15个左右,我们直...
分类:其他好文   时间:2016-05-12 21:02:30    阅读次数:166
hdu 4135 Co-prime 容斥原理
Co-prime Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others) Problem Description Given a number N, you are asked to count ...
分类:其他好文   时间:2016-05-11 13:21:54    阅读次数:218
HDU - 4135 Co-prime
容斥原理的应用...
分类:其他好文   时间:2016-05-07 11:14:33    阅读次数:131
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