题解 | #通用排序套路#一看就懂#成绩排序#

class student:
    def __init__(self,name,grade) -> None:
        self.name=name
        self.grade=grade

n =int(input())
m = int(input())
students=[]
for _ in range(n):
    name,grade=input().split()
    students.append(student(name,int(grade)))

if m ==0:
    students.sort(key=lambda x : (-x.grade))
else:
    students.sort(key=lambda x : (x.grade))
for i in range(n):
    print(students[i].name,students[i].grade,sep=' ')