题解 | #自动售货系统#

d_price={'A1':2,'A2':3,'A3':4,'A4':5,'A5':8,'A6':6}
d_qty={'A1':0,'A2':0,'A3':0,'A4':0,'A5':0,'A6':0}
box={10:0,5:0,2:0,1:0}
balance=0
def return_money(balance):
    q10,q5,q2,q1=0,0,0,0
    while balance>0:
        if balance>=10 and box[10]>=1:
            balance-=10
            q10+=1
            box[10]-=1
        elif balance>=5 and box[5]>=1:
            balance-=5
            q5+=1
            box[5]-=1
        elif balance>=2 and box[2]>=1:
            balance-=2
            q2+=1
            box[2]-=1
        elif balance>=1 and box[1]>=1:
            balance-=1
            q1+=1
            box[1]-=1
        else:
            balance=0
    return balance,q10,q5,q2,q1
commands=input().strip(';').split(';')
for command in commands:
    l=command.split()
    if l[0]=='r':
        d_qty['A1'],d_qty['A2'],d_qty['A3'],d_qty['A4'],d_qty['A5'],d_qty['A6']=map(int,l[1].split('-'))
        box[1],box[2],box[5],box[10]=map(int,l[2].split('-'))
        print('S001:Initialization is successful')
    elif l[0]=='p':
        if l[1] not in ['1','2','5','10']:
            print('E002:Denomination error')
        elif l[1] in ['5','10'] and box[1]+box[2]*2<int(l[1]):
            print('E003:Change is not enough, pay fail')
        elif sum([d_qty['A1'],d_qty['A2'],d_qty['A3'],d_qty['A4'],d_qty['A5'],d_qty['A6']])==0:
            print('E005:All the goods sold out')
        else:
            balance+=int(l[1])
            box[int(l[1])]+=1
            print(f'S002:Pay success,balance={balance}')
    elif l[0]=='b':
        if l[1] not in d_price:
            print('E006:Goods does not exist')
        elif d_qty[l[1]]==0:
            print('E007:The goods sold out')
        elif balance<d_price[l[1]]:
            print('E008:Lack of balance')
        else:
            balance-=d_price[l[1]]
            d_qty[l[1]]-=1
            print(f'S003:Buy success,balance={balance}')
    elif l[0]=='c':
        if balance==0:
            print('E009:Work failure')
        else:
            balance,q10,q5,q2,q1=return_money(balance)
            print(f'1 yuan coin number={q1}')
            print(f'2 yuan coin number={q2}')
            print(f'5 yuan coin number={q5}')
            print(f'10 yuan coin number={q10}')
    elif l[0]=='q':
        if l[1] not in ['0','1']:
            print('E010:Parameter error')
        elif l[1]=='0':
            for k in sorted(d_qty,key=lambda k:1000-d_qty[k]):
                print(f'{k} {d_price[k]} {d_qty[k]}')
        elif l[1]=='1':
            print(f'1 yuan coin number={box[1]}')
            print(f'2 yuan coin number={box[2]}')
            print(f'5 yuan coin number={box[5]}')
            print(f'10 yuan coin number={box[10]}')
    else:
        print('E010:Parameter error')
查询商品信息时，记得按商品数量排序输出。