ans

#include <iostream>
#include <iomanip>
#include <cmath>
#include <cstdio>
#include <cstring>
#include <algorithm>
#include <ctime>
#include <limits>
#include <assert.h>
#include <stdlib.h>
using namespace std;
#define LL long long
#define ull unsigned long long
const int N=1e6+10;
const int INF=0x3f3f3f3f;
const double pi=3.1416;
int n,a[N],m,j=1,ans=INF,ansa,ansb;
int sum;
int v[2010];
int main(){
	cin>>n>>m;
	for(int i=1;i<=n;i++){
		cin>>a[i];
	}
	for(int i=1;i<=n;i++){
		v[a[i]]++;
		if(v[a[i]]==1)sum++;
		while(v[a[j]]>=2){
			v[a[j]]--;
			j++;
		}
		if(sum==m){
			if(i-j+1<ans){
				ans=i-j+1;
				ansa=j;
				ansb=i;
			}
		}
	}
	cout<<ansa<<" "<<ansb;
return 0;
}