HDU2212
1)名字叫dfs,然而并不是用dfs。
水的不得了,不应该浪费太多时间去想复杂算法,名字是来迷惑的;首先将0!~9!打表方便多次调用;实际上只要看到最大值:9!=362880,那么假设十个数都是9!那么所能到达的最大和也就是3628800,那么循环只要检测到1~3628800即可;这种看到不需要输入的题,也可以先用程序将所有答案暴力搜出,然后写个输出程序将找到的答案输出即可。
#include
#include
//#include
#include //int64_t的头文件
using namespace std;
long long int sun=0;
int db[13];
long long int dfs(long long int num){sun+=db[num%10];if(num/10){long long int g=dfs(num/10);}return sun;
}
int main()
{db[0]=1;for(int i=1;i<=9;i++){db[i]=db[i-1]*i;}long long int sum=1;for(long long int i=1;i<=3628800;i++){//int64_t weishu=10;//r =i%10;if(i%10==0){//weishu*=10;sun=0;sum=dfs(i);if(sum==i)cout<
2)
DFS
Time Limit: 5000/2000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 7201 Accepted Submission(s): 4419
Problem Description A DFS(digital factorial sum) number is found by summing the factorial of every digit of a positive integer.
For example ,consider the positive integer 145 = 1!+4!+5!, so it's a DFS number.
Now you should find out all the DFS numbers in the range of int( [1, 2147483647] ).
There is no input for this problem. Output all the DFS numbers in increasing order. The first 2 lines of the output are shown below.
Input no input
Output Output all the DFS number in increasing order.
Sample Output
1 2 ......
本文来自互联网用户投稿,文章观点仅代表作者本人,不代表本站立场,不承担相关法律责任。如若转载,请注明出处。 如若内容造成侵权/违法违规/事实不符,请点击【内容举报】进行投诉反馈!
