import math, string, itertools, fractions, heapq, collections, re,  array, bisect, sys, random, time, copy, functools


sys.setrecursionlimit(10**7)
inf = 10 ** 20
eps = 1.0 / 10**10
mod = 10**9+7
dd = [(-1, 0), (0, 1), (1, 0), (0, -1)]
ddn = [(-1, 0), (-1, 1), (0, 1), (1, 1), (1, 0), (1, -1), (0, -1), (-1, -1)]


def LI(): return [int(x) for x in sys.stdin.readline().split()]
def LI_(): return [int(x)-1 for x in sys.stdin.readline().split()]
def LF(): return [float(x) for x in sys.stdin.readline().split()]
def LS(): return sys.stdin.readline().split()
def I(): return int(sys.stdin.readline())
def F(): return float(sys.stdin.readline())
def S(): return input()
def pf(s): return print(s, flush=True)


N = I()
T, A = LI()
H = LI()

result = 10**18
result_idx = 0
for idx, h in enumerate(H):
    height = T - h * 0.006
    if abs(A - height) < result:
        result = abs(A - height)
        result_idx = idx + 1

print(result_idx)

9a58f7e082f192136c942f3422dcad3b4a174861
<mask token>


def LI():
    return [int(x) for x in sys.stdin.readline().split()]


def LI_():
    return [(int(x) - 1) for x in sys.stdin.readline().split()]


<mask token>


def LS():
    return sys.stdin.readline().split()


<mask token>


def S():
    return input()


def pf(s):
    return print(s, flush=True)


<mask token>

<mask token>


def LI():
    return [int(x) for x in sys.stdin.readline().split()]


def LI_():
    return [(int(x) - 1) for x in sys.stdin.readline().split()]


def LF():
    return [float(x) for x in sys.stdin.readline().split()]


def LS():
    return sys.stdin.readline().split()


def I():
    return int(sys.stdin.readline())


<mask token>


def S():
    return input()


def pf(s):
    return print(s, flush=True)


<mask token>

<mask token>
sys.setrecursionlimit(10 ** 7)
<mask token>


def LI():
    return [int(x) for x in sys.stdin.readline().split()]


def LI_():
    return [(int(x) - 1) for x in sys.stdin.readline().split()]


def LF():
    return [float(x) for x in sys.stdin.readline().split()]


def LS():
    return sys.stdin.readline().split()


def I():
    return int(sys.stdin.readline())


def F():
    return float(sys.stdin.readline())


def S():
    return input()


def pf(s):
    return print(s, flush=True)


<mask token>
for idx, h in enumerate(H):
    height = T - h * 0.006
    if abs(A - height) < result:
        result = abs(A - height)
        result_idx = idx + 1
print(result_idx)

import math, string, itertools, fractions, heapq, collections, re, array, bisect, sys, random, time, copy, functools
sys.setrecursionlimit(10 ** 7)
inf = 10 ** 20
eps = 1.0 / 10 ** 10
mod = 10 ** 9 + 7
dd = [(-1, 0), (0, 1), (1, 0), (0, -1)]
ddn = [(-1, 0), (-1, 1), (0, 1), (1, 1), (1, 0), (1, -1), (0, -1), (-1, -1)]


def LI():
    return [int(x) for x in sys.stdin.readline().split()]


def LI_():
    return [(int(x) - 1) for x in sys.stdin.readline().split()]


def LF():
    return [float(x) for x in sys.stdin.readline().split()]


def LS():
    return sys.stdin.readline().split()


def I():
    return int(sys.stdin.readline())


def F():
    return float(sys.stdin.readline())


def S():
    return input()


def pf(s):
    return print(s, flush=True)


N = I()
T, A = LI()
H = LI()
result = 10 ** 18
result_idx = 0
for idx, h in enumerate(H):
    height = T - h * 0.006
    if abs(A - height) < result:
        result = abs(A - height)
        result_idx = idx + 1
print(result_idx)

import math, string, itertools, fractions, heapq, collections, re,  array, bisect, sys, random, time, copy, functools


sys.setrecursionlimit(10**7)
inf = 10 ** 20
eps = 1.0 / 10**10
mod = 10**9+7
dd = [(-1, 0), (0, 1), (1, 0), (0, -1)]
ddn = [(-1, 0), (-1, 1), (0, 1), (1, 1), (1, 0), (1, -1), (0, -1), (-1, -1)]


def LI(): return [int(x) for x in sys.stdin.readline().split()]
def LI_(): return [int(x)-1 for x in sys.stdin.readline().split()]
def LF(): return [float(x) for x in sys.stdin.readline().split()]
def LS(): return sys.stdin.readline().split()
def I(): return int(sys.stdin.readline())
def F(): return float(sys.stdin.readline())
def S(): return input()
def pf(s): return print(s, flush=True)


N = I()
T, A = LI()
H = LI()

result = 10**18
result_idx = 0
for idx, h in enumerate(H):
    height = T - h * 0.006
    if abs(A - height) < result:
        result = abs(A - height)
        result_idx = idx + 1

print(result_idx)
