if __name__ == '__main__':
    students={}
    for _ in range(int(input())):
        name = input()
        score = float(input())
        students[name]=score

    min_value = min(students.values())
    students = {k: v for k, v in students.items() if v>min_value}
    min_value = min(students.values())
    students_names = dict(filter(lambda item: item[1]==min_value,students.items()))
    students_names = sorted(students_names.keys())
    for st in students_names:
        print(st)