题解 | 买橘子

#include <stdio.h>

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

    int count = 0;
    int num = n / 6;
    for(int y = 0; y < num; y++){
        int res = n - 6 * y;
        if(res % 8 == 0){
            int ans = y + res / 8;
            printf("%d", ans);
            count++;
            break;
        }
    }
    if(count == 0)
        printf("-1");

    return 0;
}