DescriptionThe Euler function phi is an important kind of function in nu
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2022-11-09 19:22:42
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欧拉函数的原始公式是用n连乘（1-1/pi）。pi是n的素因子。我们可以通过一个n^2级筛法的方式去筛，这样就保证了每个合数都会被其所有素因子筛一次，只要在筛的时候在其结果上乘上1-1/pi）即可。View Code #include <iostream>#include <cstdio>#include <cstdlib>#include <cstring>using namespace std;#define maxn 3000005double ans[maxn];bool prime[maxn];int next(int a){ a +=
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2011-03-19 15:13:00
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题目地址：点击打开链接思路：递推求欧拉函数AC代码：#include #include #define maxn 3000000//不能加分号long long x[3000000];int main(){ long long sum; int i,j,a,b; for(i=1; i<maxn; i++) x[i] = i;
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2022-08-04 09:13:54
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筛法计算欧拉函数#include #include using namespace std;const int maxn=3000005;long long phi[maxn];int main(){ int i,j,a,b; for(i=1;i<=maxn;i++) phi[i]=i; for(i=2;i<=maxn;i+=2) phi[i]/=2; for(i=3;i<=maxn;i+=2)if(phi[i]==i){ for(j=i;j<=maxn;j+=i) phi[j]=phi[j]/i*(i-1); } while(sca...
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2014-04-07 14:51:00
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The Euler function Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 5235 Accepted Submission(s): 2
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2021-07-21 15:35:05
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Problem Description The Euler function phi is an important kind of function in number theory, (n) represents the amount of the numbers which are small
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2017-08-16 19:16:00
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Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 5028 Accepted Submission(s): 2123 题意：求a到b之间的每个数的欧
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2016-03-24 19:59:00
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The Euler functionTime Limit: 2000/1000 MS (Java/Others)Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 3
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2022-03-18 14:14:24
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思路： 打表。 利用公式。 类似素数打表一样。 #includeusing namespace std;const int N=3e6+10;bool isPrime[N];long long res[N];void init(){ res[1]=1; memset(isPri...
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2017-02-04 17:27:00
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The Euler functionTime Limit : 2000/1000ms (Java/Other) Memory Limit : 32768/32768K (Java/Other)Total Submission(s) : 26 Accepted Submission(s) : 16Problem DescriptionThe Euler function phi is an important kind of function in number theory, (n) represents the amount of the numbers which are smaller
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2012-12-18 14:29:00
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The Euler functionTime Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 3817 Accepted Submission(s): 1580Problem DescriptionThe Euler f
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2023-02-17 09:37:00
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题目链接： Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 4987 Accepted Submission(s): 2098
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2016-03-13 23:32:00
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The Euler functionTime Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 8008 Accepted Submission(s):
3336P
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2022-09-16 10:29:45
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传送门 分析 二分一个数表示查询位置的数是多少，将序列中大于等于这个数的数赋为1，其余赋为0，对于每一个区间查询区间和（即区间内1的个数），然后区间修改将前/后半部分修改为1，其余修改为0即可 代码
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2018-10-07 19:16:00
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The Euler function Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 4743 Accepted Submission(s): 1983
Proble
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2023-04-20 06:33:19
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The Euler function Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others) Problem Description The Euler function phi is an i
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2016-05-05 23:58:00
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