题解 | #记负均正#

if nums.count(0) == len(nums): print("0 0.0") else: print(negative, round(res / len(positive), 1))

加个判断啊

while True: try: num = int(input()) inputint = list(map(int,input().split())) L = [] L1 = [] for i in inputint: if i < 0: L.append(i) elif i > 0: L1.append(i) if len(L1) == 0: print(0,0.0) else: print(len(L),'%.1f'%(sum(L1)/len(L1))) except: break

len(a)=0时，不能做分母

3 0 0 0 的时候你这代码就跑不通过啊。到处都是bug

思路很清晰

加一个判断 if len(a)!=0: #分母不能为0 print(len(b),round(sum(a)/len(a),1)) else: print('0 0.0')

if a == []: print(len(b), 0.0) else: print(len(b), round(sum(a)/len(a), 1))

while True: try: n = int(input()) num_list = list(map(int, input().split())) a, b = [], [] for i in num_list: if i > 0: a.append(i) elif i < 0: b.append(i) if a or b: print(len(b), round(sum(a) / len(a), 1)) else : print("0 0.0") except: break 修补一下能用，不过还有bug

改了一下下：while True: try: n=int(input()) m=list(map(int,input().split())) a,b=[],[] if m.count(0)==len(m): print(0,0.0) else: for i in m: if i >0: a.append(i) elif i <0: b.append(i) print(len(b),round(sum(a)/len(a),1)) except: break

代码不对

最后判断一下if a==[]，是的话a.append(0其他就不用改了