【USACO 1.2.5】双重回文数

 1 #include <cstdlib>
 2 #include <iostream>
 3 #include <cstdio>
 4 #include <cmath>
 5 #include <cstring>
 6 const int maxl=100000;
 7 using namespace std;
 8 int shu_1[maxl],shu_2[maxl];
 9 int temp[maxl];
10 //进制转换 
11 void change(int *shu,int num,int system);
12 bool check(int *shu);//检查是否是回文数 
13 int main()
14 {
15     int n,i,s,cnt=0;
16     
17     //文件操作
18     freopen("dualpal.in","r",stdin);
19     freopen("dualpal.out","w",stdout);
20     scanf("%d%d",&n,&s);
21     
22     for (i=s+1;;i++)
23     {
24         if (cnt==n) break;
25         int lj=0;
26         for (int j=2;j<=10;j++)
27         {
28             change(shu_1,i,j);
29             if (check(shu_1)) lj++;
30         }
31         if (lj>=2) {printf("%d\n",i);cnt++;}
32     } 
33     return 0;
34 }
35 //把一个num转换成system进制的数 
36 void change(int *shu,int num,int system)
37 {
38      int point=0;
39      memset(shu,0,sizeof(shu));
40      memset(temp,0,sizeof(temp));
41      point++;
42      //进制转换 
43      while (num!=0)
44      {
45            int t;
46            t=num%system;
47            num=num/system;
48            temp[point++]=t;
49      }
50      point--;
51      for (int i=point;i>=1;i--) shu[point-i+1]=temp[i];
52      shu[0]=point;//长度 
53      return;
54 }
55 bool check(int *shu)
56 {
57      int point=shu[0],i;
58      for (i=1;i<=(point/2)+1;i++)
59      if (shu[i]!=shu[point-i+1]) return 0;
60      return 1;
61 }