Beautiful Number

http://acm.zju.edu.cn/onlinejudge/showProblem.do?problemCode=2829

Beautiful Number

Time Limit: 2 Seconds Memory Limit: 65536 KB

Mike is very lucky, as he has two beautiful numbers, 3 and 5. But he is so greedy that he wants infinite beautiful numbers. So he declares that any positive number which is dividable by 3 or 5 is beautiful number. Given you an integer N (1 <= N <= 100000), could you please tell mike the Nth beautiful number?

Input

The input consists of one or more test cases. For each test case, there is a single line containing an integer N.

Output

For each test case in the input, output the result on a line by itself.

Sample Input

1
2
3
4

Sample Output

3
5
6
9

题目思路，刚开始我以为只有能被3或5整除的数为beautiful number，英语翻译过来后是只要能被3或5整除的数为beautiful number，那么就简单了,

预处理一下，map映射随便做。注意，最大是第100000个数，而不是beautiful number最大是100000。

#include <iostream>

#include <cstdio>

#include <cstring>

#include <queue>

#include <cmath>

#include <vector>

#include <set>

#include <map>

#include <algorithm>

using namespace std;

typedef long long ll;

map<ll,ll>m;

void getbeautifulnumber()

{

    int p=;

    for(int i=; ;i++)

    {

        if(p>) break;

        if(i%== || i%==)

            m[p++]=i;

    }

}

int main()

{

    int n;

    getbeautifulnumber();

    while(scanf("%d",&n)!=EOF)

    {

        printf("%d\n",m[n]);

    }

    return ;

}

巴特西

Beautiful Number

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