1 typedef long long ll;
 2 #define _for(i,a,b) for(int i = (a);i < b;i ++)
 3 #define _rep(i,a,b) for(int i = (a);i > b;i --)
 4 #define INF 0x3f3f3f3f
 5 #define pb push_back
 6 #define maxn 10000
 7 
 8 class Solution
 9 {
10     public:
11         int flag;
12         string ss;
13         bool judge(int st,int len)
14         {
15             _for(i,st,st + len - 1)
16             {
17                 if(ss[i] != ss[i+1])
18                     return false;
19             }
20             return true;
21         }
22         string removeDuplicates(string s, int k)
23         {
24             flag = 0;
25             ss = s;
26             while(s.size()!=flag)
27             {
28                 flag = s.size();
29                 ss = s;
30                 _for(i,0,s.size())
31                 {
32                     if(judge(i,k))
33                     {
34                         s.erase(i,k);
35                         i = -1;
36                         ss = s;
37                     }
38                 }
39             }
40             return s;
41         }
42 };