题解 | 小红的字符串

#include <stdio.h>
#include <string.h>
#include <stdlib.h>

int compare(int a, int b){
    return a < b ? a : b;
}

int main() {
    char ch[1005];
    scanf("%s", ch);

    int n = strlen(ch);
    int ans = 0;
    for(int i = 0; i < n/2; i++){
        int char1 = ch[i] - 'a';
        int char2 = ch[n - i - 1] - 'a';
        int diff = abs(char1 - char2);
        int min = compare(diff, 26 - diff);
        ans += min;
    }
    printf("%d\n", ans);
    
    return 0;
}