#include <stdio.h>
void main()
{
    int x,y;
    float z;

    printf("enter x,y:\n");
    scanf("%d%d",&x,&y);
    switch(y)
    {
    case 1: z=x+x*12*0.315/100;break;
    case 2: z=x+x*12*2*0.330/100;break;
    case 3: z=x+x*12*3*0.345/100;break;
    case 5: z=x+x*12*5*0.375/100;break;
    case 8: z=x+x*12*8*0.420/100;break;
    default: printf("数据错误!\n");
    }

    printf("%f\n",z);
}