题解 | 牛牛的考试

#include <stdio.h>
#include <string.h>
#define Max 601

int main() {
    int T;
    scanf("%d", &T);

    while (T--) {
        char options[4][Max];
        int lens[4];
        for (int i = 0; i < 4; i++) {
            //读入并计算长度
            scanf("%s", options[i]);
            lens[i] = strlen(options[i]);
        }

        int Min_ind = 0, Max_ind = 0;
        int Min_cnt = 1, Max_cnt = 1;
        int max = lens[0], min = lens[0];

        for (int i = 1; i < 4; i++) {
            if (max < lens[i]) {
                max = lens[i];
                Max_ind = i;
                Max_cnt = 1;
            } else if (max == lens[i]) {
                Max_cnt++;
            }

            if (min > lens[i]) {
                min = lens[i];
                Min_ind = i;
                Min_cnt = 1;
            } else if (min == lens[i]) {
                Min_cnt++;
            }
        }
        //每次到这里的时候都会更新Min_ind Max_ind max min这些值的，所以不用再放循环了，这本来就是判断单个题的逻辑

        if (Max_cnt == 1 && Min_cnt != 1) {
            printf("%c\n", 'A' + Max_ind);
        } else if (Min_cnt == 1 && Max_cnt != 1) {
            printf("%c\n", 'A' + Min_ind);
        } else {
            printf("C\n");
        }
    }
    return 0;
}