请用C语言编辑一下这个问题

#include <stdio.h>
int main()
{
    float dis;
    int st;
    float ff;
    scanf("%f %d",&dis,&st);
    if(dis <= 3)
        ff = 10;
    else if(dis > 3 &&dis <=10)
        ff = 10 + (dis - 3)*2;
    else
        ff = 10 + 7*2 + (dis - 10) * 3;
    if(st >= 5)
        ff += st/5 * 2;
    printf("%.1f",ff);
    return 0;
}