score = input("請輸入成績 ")
score = int(score)
if (score>0 and score<100):
    print("請輸入0 ~ 100的數字")
if (score>=90 and score<=100):
    print("優")
if (score>=80 and score<=89):
    print("甲")
if (score>=70 and score<=79):
    print("乙")
if (score>=60 and score<=69):
    print("丙")
if (score<60):
    print("丁")    
    
13653e872b50fba9b20f1bdafb7780a2e290e082
<mask token>

<mask token>
if score > 0 and score < 100:
    print('請輸入0 ~ 100的數字')
if score >= 90 and score <= 100:
    print('優')
if score >= 80 and score <= 89:
    print('甲')
if score >= 70 and score <= 79:
    print('乙')
if score >= 60 and score <= 69:
    print('丙')
if score < 60:
    print('丁')

score = input('請輸入成績 ')
score = int(score)
if score > 0 and score < 100:
    print('請輸入0 ~ 100的數字')
if score >= 90 and score <= 100:
    print('優')
if score >= 80 and score <= 89:
    print('甲')
if score >= 70 and score <= 79:
    print('乙')
if score >= 60 and score <= 69:
    print('丙')
if score < 60:
    print('丁')

score = input("請輸入成績 ")
score = int(score)
if (score>0 and score<100):
    print("請輸入0 ~ 100的數字")
if (score>=90 and score<=100):
    print("優")
if (score>=80 and score<=89):
    print("甲")
if (score>=70 and score<=79):
    print("乙")
if (score>=60 and score<=69):
    print("丙")
if (score<60):
    print("丁")    
    