POJ 2196

 1 #include <iostream>
 2 using namespace std;
 3 
 4 int sum_10;
 5 int sum_12;
 6 int sum_16;
 7 int fun_10(int num);
 8 int fun_12(int num);
 9 int fun_16(int num);
10 int main()
11 {
12 //    freopen("acm.acm","r",stdin);
13     sum_10 = 0;
14     sum_12 = 0;
15     sum_16 = 0;
16     int i;
17     for(i = 1000; i <= 9999; ++ i)
18     {
19         sum_10 = fun_10(i);
20         sum_12 = fun_12(i);
21         if(sum_10 != sum_12)
22         {
23             continue;
24         }
25         sum_16 = fun_16(i);
26         if(sum_10 == sum_16 && sum_12 == sum_10)
27         {
28             cout<<i<<endl;
29         }
30     }
31 }
32 
33 int fun_10(int num)
34 {
35     int sum = 0;
36     while(num)
37     {
38         sum += num%10;
39         num /= 10;
40     }
41     return sum;
42 }
43 
44 int fun_12(int num)
45 {
46     int sum = 0;
47     while(num)
48     {
49         sum += num%12;
50         num /= 12;
51     }
52     return sum;
53 }
54 
55 int fun_16(int num)
56 {
57     int sum = 0;
58     while(num)
59     {
60         sum += num%16;
61         num /= 16;
62     }
63     return sum;
64 }

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