challenge_chichi.py

if _name_ == '_main_':
    
    a = []
    
    for _ in range(int(raw_input())):
        name = raw_input()
        score = float(raw_input())
        a.append([name,score])
    
    sorted_a = sorted(a, key=lambda x: x[1])
    
    names_without_lowests = []
    
    # here im evaluating if more than 1 person has the lowest grade and not adding them to the list of names. but the problem now is that the code includes everyone else.
    
    i = 0
    
    while i < len(sorted_a):
        if sorted_a[0][1] != sorted_a[i][1]:
            names_without_lowests.append(sorted_a[i])
            i += 1
        
        else:
            
            i += 1
    
    #here Im removing the remainder name with higher grades besides de second lowests
    
    k = 0 
    
    names = []
    
    while k < len(names_without_lowests):
        if names_without_lowests[0][1] == names_without_lowests[k][1]:
            names.append(names_without_lowests[k][0])
            k += 1
        else:
            
            k+=1
            
    sorted_names = sorted(names)
    
    for i in sorted_names:
        print(i)