#include <bits/stdc++.h>
using namespace std;
int main() {
  std::ios_base::sync_with_stdio(0);
  std::cin.tie(0);
  std::cout.tie(0);
  int k, n;
  cin >> n >> k;
  int a[n];
  int ans = 0;
  map<int, int> ct;
  for (long long i = 0; i < (long long)n; i++) {
    cin >> a[i];
  }
  int l = 0, r = 0;
  int j = 0;
  ct.clear();
  for (long long i = 0; i < (long long)n; i++) {
    while (j < n) {
      if (++ct[a[j]] == 1) ans++;
      if (ans > k) {
        if (--ct[a[j]] == 0) ans--;
        break;
      }
      j++;
    }
    if (r - l < j - i) {
      r = j;
      l = i;
    }
    if (--ct[a[i]] == 0) ans--;
  }
  cout << l + 1 << " " << r << "\n";
  return 0;
}
