n soldiers stand in a circle. For each soldier his height ai is known. A reconnaissance unit can be made of such two neighbouring soldiers, whose heights difference is minimal, i.e. |ai - aj| is minimal. So each of them will be less noticeable with the other. Output any pair of soldiers that can form a reconnaissance unit.

Input

The first line contains integer n (2 ≤ n ≤ 100) — amount of soldiers. Then follow the heights of the soldiers in their order in the circle — n space-separated integers a1, a2, ..., an (1 ≤ ai ≤ 1000). The soldier heights are given in clockwise or counterclockwise direction.

Output

Output two integers — indexes of neighbouring soldiers, who should form a reconnaissance unit. If there are many optimum solutions, output any of them. Remember, that the soldiers stand in a circle.

Examples

Input

5
10 12 13 15 10


Output

5 1


Input

4
10 20 30 40


Output

1 2
n = input()
a = map(int, raw_input().split())
ml = -1
mr = -1
for i in range(n - 1):
    if ((abs(a[i] - a[i + 1]) < abs(a[mr] - a[ml]))  or ((ml == -1) & (mr == -1))):
        mr = i
        ml = i + 1
if (abs(a[n - 1] - a[0]) < abs(a[mr] - a[ml])):
    mr = n - 1
    ml = 0
print mr + 1, ml + 1