def solve(s):
if not s:
return ''
dic = {}
for i in s:
dic[i] = dic.get(i, 0) + 1
dic = sorted(dic.items(), key=lambda x: x[0])
res = ''
for i in dic:
res += i[0]
res += str(i[1])
return res
if __name__ == '__main__':
s = input()
print(solve(s))
我这样一次就过了 x=input() string1=list(x) jihe=set(string1) result=list(jihe) result.sort() final=[] for i in range(len(result)): final.append(result[i]) final.append(str(string1.count(result[i]))) print(''.join(final))