题解 | #删除字符串中出现次数最少的字符#

/***********
*先存储再查找最小次数，最后剔除输出
************/
#include <stdio.h>
#include <string.h>
int main() {
    char str[21];
    while( scanf( "%s", str ) != EOF )
    {
        int flag[26] = {0};
        int min = 20;
        int len = strlen(str);
        for( int i = 0; i<len; i++ )
        {
            flag[str[i] - 'a']++;
        }
        for( int i = 0; i<26; i++ )
        {
            if( flag[i] && flag[i] < min )
                min = flag[i];
        }
        for( int i = 0; i<len; i++ )
        {
            if( flag[str[i] - 'a'] > min )
                printf( "%c", str[i] );
        }
        printf("\n");
    }
   
    return 0;
}