if name == 'main': list=[] second_lowest = int()

for _ in range(int(input())):
    name = input()
    score = float(input())
    list.append([name, score])

list.sort(key=lambda score: score[1])
lowest = list[0][1]

for name, score in list:
    if score > lowest:
        second_lowest = score
        break
second_lowest_list = [name for name, score in list if score == second_lowest]
second_lowest_list.sort()
for name in second_lowest_list:
    print(name)