if __name__ == '__main__':
    records = []
    for _ in range(int(input())):
        name = input()
        score = float(input())
        records.append([name,score])
# record and sort the grades of each student while removing the duplicates
    grades = sorted(list(set([record[1] for record in records])))
    
# Finding the second lowest value
second_lowest = grades[1]

# Store and display the student names who has the second lowest scores
students = sorted(record[0] for record in records if record[1] == second_lowest)
for i in students:
    print(i)