import math

numbers = []

f = open('099.txt', 'r')
for line in f:
	line.rstrip('\n')
	l = [int(x) for x in line.split(',')]
	numbers.append(l[1] * math.log(l[0]))  # log(x^r) = r*log(x)
f.close()

maxline = 0
maxn = 0

for n in xrange(0, len(numbers)-1):
	if numbers[n] > maxn:
		maxn = numbers[n]
		maxline = n

print maxline+1