Array

http://codeforces.com/problemset/problem/224/B
暴力
View Code
 1 #include <iostream>
 2 using namespace std;
 3 const int maxn=100005;
 4 bool f[maxn];
 5 int ans[maxn],s[maxn];
 6 int main()
 7 {
 8     int n,k,i,j,mark;
 9     cin>>n>>k;
10     {
11         mark=-1;
12         for(i=0;i<n;i++)
13         {
14             cin>>ans[i];
15             if(f[ans[i]]) s[i]=s[i-1];
16             else
17             {
18                 f[ans[i]]=1;
19                 s[i]=s[i-1]+1;  
20                 if(s[i]==k) mark=i;
21             }
22         }
23         if(mark>=0)
24         {
25             j=k;
26             for(i=mark;i>=0,j>0;i--)
27             {
28                 if(f[ans[i]])
29                 {
30                     f[ans[i]]=0;
31                     j--;
32                 }
33                 else
34                 {
35                     continue;
36                 }
37             }
38             cout<<i+2<<" "<<mark+1<<endl;
39         }
40         else 
41         {
42             cout<<"-1 -1"<<endl;
43         }
44     }
45     return 0;
46 }