C :

#include "stdio.h"
#include "math.h"
int main() {
    float dis;
    int minute;
    float price = 0;
    scanf("%f,%d", &dis, &minute);
 
    // 按照规则计算里程费用
    if (dis <= 3) {
        price = 8;
    } else if (dis <= 10) {
        price = 8 + (dis - 3) * 2;
    } else {
        price = 8 + 7 * 2 + (dis - 10) * 3;
    }
 
    // 不足五分钟不计分，即只计算五的倍数
    int time = minute / 5;
    price = price + 2*time;
 
    // 计算四舍五入
    float t = price - (int)price;
    if (t >= 0.5) {
        price = (int) price + 1;
    } else {
        price = (int) price;
    }
 
    // 输出价格
    printf("fee = %.0f\n", price);
    return 0;
}