出处:
https://pintia.cn/problem-sets/994805260223102976/problems/994805300404535296
代码:
n = input()
num = [0] * 10 #建立一个数组,用来统计0-9出现的次数
for i in n:
num[int(i)] += 1
for i in range(10):
if num[i] != 0:
print('%d:%d'%(i,num[i])) #按格式输出