#include<ios>
int c[1000005],a[500005],n,i,k,l,r,s,x,y=-1;
main(){
	for(scanf("%d%d",&n,&k),i=1;i<=n;i++)scanf("%d",a+i);
	for(l=1,r=1;r<=n;r++){
		for(s+=!c[a[r]]++;l<=r&&s>k;s-=!--c[a[l++]]);
		if(r-l>y-x)y=r,x=l;
	}
	printf("%d %d",x,y);
}