题目：

题解：

class Solution {
public:string originalDigits(string s) {unordered_map<char, int> c;for (char ch: s) {++c[ch];}vector<int> cnt(10);cnt[0] = c['z'];cnt[2] = c['w'];cnt[4] = c['u'];cnt[6] = c['x'];cnt[8] = c['g'];cnt[3] = c['h'] - cnt[8];cnt[5] = c['f'] - cnt[4];cnt[7] = c['s'] - cnt[6];cnt[1] = c['o'] - cnt[0] - cnt[2] - cnt[4];cnt[9] = c['i'] - cnt[5] - cnt[6] - cnt[8];string ans;for (int i = 0; i < 10; ++i) {for (int j = 0; j < cnt[i]; ++j) {ans += char(i + '0');}}return ans;}
};