HDU-5373-水题-卡常数时间

 1 #include <cstdio>
 2 #include <algorithm>
 3 #include <cstring>
 4 #include <ctype.h>
 5 #include <cstdlib>
 6 #include <stack>
 7 #include <set>
 8 #include <map>
 9 #include <queue>
10 #include <string>
11 
12 using namespace std;
13 
14 int N,T;
15 int len = 0;
16 
17 int mem,ans;
18 
19 void solve(int n)
20 {
21     int li=0,nn = n;
22     do{
23         mem += n%10;
24         n/=10;
25         li++;
26     }while(n);
27     
28     int t = li;
29     
30     while(li--)
31     {
32         int a = (nn%10);
33         int b = ((((len+li) % 2) == 1) ? 10 : 1); 
34         //printf("%d %d\n",nn%10,len+li);
35         nn/=10;
36         ans += (a*b%11);
37         ans %= 11;
38     }
39     len += t;
40 }
41 
42 int main()
43 {
44     int kase = 0;
45 
46     while(~scanf("%d%d",&N,&T) && N != -1 && T != -1)
47     {
48         kase ++;
49 
50         len = 0;
51         mem = 0;
52         ans = 0;
53 
54         solve(N);
55         while(T--) solve(mem);
56         ans %= 11;
57 
58         if(ans == 0) printf("Case #%d: Yes\n",kase);
59         else printf("Case #%d: No\n",kase);
60     }
61 }