华为笔试题67--删除字符串中出现次数最少的字符

 1 #include <iostream>
 2 #include <string>
 3 #include <algorithm>
 4 using namespace std;
 5 int main()
 6 {
 7     string str;
 8     while(cin >> str) {
 9         int minFreq = 20;
10         int freq[26] = {0};
11         for(char c : str) {
12             ++freq[c - ‘a‘];
13         }
14         for(int i = 0; i < 26; ++i) {
15             if(freq[i]) minFreq = min(minFreq, freq[i]);
16         }
17         for(int i = 0; i < str.size(); ++i) {
18             if(freq[str[i]-‘a‘] != minFreq) cout << str[i]; 
19         }
20         cout << endl;
21     }
22 }