if __name__ == '__main__':
    recs = []
    
    for _ in range(int(input())):
        name = input()
        score = float(input())
        recs.append([name, score])
    
    low_2nd = sorted(set([score for _, score in recs]))[1]    
    low_2nd_names = [name for name, score in recs if score == low_2nd]   
    for name in sorted(low_2nd_names): print(name)