import math

def search(fn):
    lst = list(map(lambda x: (int(x[0]), int(x[1])),
            map(lambda x: x.strip().split(','),
                open('../resource/base_exp.txt', 'r').readlines()
            )
        ))
    return lst.index(max(lst, key=lambda x: x[1] * math.log(x[0]))) + 1


print(search('../resource/base_exp.txt'))