#include <bits/stdc++.h>
using namespace std;
const long long MAX = 5e5 + 100;
const long long mod = 1e9 + 7;
const long long inf = 1e18 + 12;
const long long N = 1002;
set<long long> ss;
map<long long, long long> mm;
int main() {
  ios_base::sync_with_stdio(false);
  cout.tie(NULL);
  cout.tie(NULL);
  ;
  long long tt = 1;
  while (tt--) {
    long long n, k;
    cin >> n >> k;
    long long a[n];
    for (long long i = 0; i < n; i++) {
      cin >> a[i];
    }
    long long ans = 0, i = 0, j = 0, x = 0, y = 0;
    while (i < n) {
      ss.insert(a[i]);
      mm[a[i]]++;
      if (ss.size() > k) {
        long long k = j;
        while (1) {
          mm[a[k]]--;
          if (mm[a[k]] == 0) {
            ss.erase(a[k]);
            break;
          }
          k++;
        }
        j = k + 1;
      }
      if (ans < i - j + 1) {
        ans = i - j + 1;
        y = i;
        x = j;
      }
      i++;
    }
    cout << x + 1 << " " << y + 1;
  }
}
