#include<bits/stdc++.h>
using namespace std;
int main()
{
double array [ 100 ] ;
long long i,n , position = 0 , check = 0;
cin >> n;
for ( i = 0 ; i < n ; i ++ ){
cin >> array [ i ];
position = position + 1;
if ( array [ i ] <= 2.5 ){
cout << position << " " << n ;
check = 1 ;
break;
}
}
if ( check == 0 ){
cout << "Not Found";
}
}
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