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
#~~~~~~~~~~~~~~~    JAI SHREE RAM    ~~~~~~~~~~~~~~~~~~#

import math; from collections import *
import sys; from functools import reduce

# sys.setrecursionlimit(10**6)

def get_ints(): return map(int, input().strip().split())
def get_list(): return list(get_ints())
def get_string(): return list(input().strip().split())
def printxsp(*args): return print(*args, end="")
def printsp(*args): return print(*args, end=" ")

DIRECTIONS = [[0, 1], [0, -1], [1, 0], [1, -1]] #up, down, right, left
NEIGHBOURS = [(i, j) for i in range(-1, 2) for j in range(-1, 2) if (i!=0 or j!=0)]

OrdUnicode_a = ord('a'); OrdUnicode_A = ord('A')
CAPS_ALPHABETS = {chr(i+OrdUnicode_A) : i for i in range(26)}
SMOL_ALPHABETS = {chr(i+OrdUnicode_a) : i for i in range(26)}

UGLYMOD = int(1e9)+7; SEXYMOD = 998244353; MAXN = int(1e5)+1; INFINITY = float('inf')

# sys.stdin=open("input.txt","r");sys.stdout=open("output.txt","w")

# for _testcases_ in range(int(input())):
n = int(input())
li = get_list()
ans = [0, 0]; mn = INFINITY
for i in range(n):
    if abs(li[i] - li[(i+1)%n]) < mn:
        mn = abs(li[i] - li[(i+1)%n])
        ans = [i+1, (i+1)%n+1]
print(*ans)


'''
>>> COMMENT THE STDIN!! CHANGE ONLINE JUDGE !!
THE LOGIC AND APPROACH IS MINE @luctivud ( UDIT GUPTA )
Link may be copy-pasted here if it's taken from other source.
DO NOT PLAGIARISE.
>>> COMMENT THE STDIN!! CHANGE ONLINE JUDGE !!
'''
