http://acdream.info/problem?pid=1114题目大意,给你一个序列a,求出这个序列中互质数的有多少对。其中所有的整数的都小于等于222222。f(d) 为 gcd 恰好为 d 的数的对数, F(d) 为 gcd 为 d 的倍数的对数, μ(d) 表示莫比乌斯函数F(d) ...
分类:
其他好文 时间:
2014-08-14 23:12:16
阅读次数:
322
1060: Nearest SequenceTime Limit:1 SecMemory Limit:64 MBSubmit:370Solved:118[Submit][Status][Web Board]Description Do you remember the "Nearest Number...
分类:
其他好文 时间:
2014-08-14 23:09:26
阅读次数:
211
http://acm.hdu.edu.cn/showproblem.php?pid=4952Number TransformationTime Limit: 2000/1000 MS (Java/Others)Memory Limit: 65536/65536 K (Java/Others)Tota...
分类:
其他好文 时间:
2014-08-14 23:08:56
阅读次数:
178
打表可以知道到后面增量都一样了,,
推论就是 i 和 i+1 互质
#include
#include
#include
#include
using namespace std;
typedef long long ll;
const ll mx = 120000;
int main() {
int cas = 0;
ll x, k, y, dis, i;...
分类:
其他好文 时间:
2014-08-14 20:45:50
阅读次数:
173
Number Transformation
Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/65536 K (Java/Others)
Total Submission(s): 76 Accepted Submission(s): 28
Problem Description
Teacher Mai has an...
分类:
其他好文 时间:
2014-08-14 20:45:29
阅读次数:
146
Problem Description
Teacher Mai has an integer x.
He does the following operations k times. In the i-th operation, x becomes the least integer no less than x, which is the multiple of i.
He wan...
分类:
其他好文 时间:
2014-08-14 20:39:59
阅读次数:
256
hdu4952 Number Transformation(数学题 | 找规律)...
分类:
其他好文 时间:
2014-08-14 20:35:59
阅读次数:
230
A Number PuzzleTime Limit: 3000/1000 MS (Java/Others)Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 938Accepted Submission(s): 276 Pro...
分类:
其他好文 时间:
2014-08-14 20:12:29
阅读次数:
194
DescriptionChristine and Matt are playing an exciting game they just invented: the Number Game. The rules of this game are as follows.The players take...
分类:
其他好文 时间:
2014-08-14 20:00:10
阅读次数:
244
select cardno,planname,ROW_NUMBER() over(partition by cardno,planname order by createtime asc) as rowfrom CardAddrBlack即:将cardno,planname看作一个分组,以他们内部的...
分类:
其他好文 时间:
2014-08-14 19:58:59
阅读次数:
140