腾讯马拉松-大笨钟-hdu4530

#include<stdio.h>
int main()
{
    int t;
    scanf("%d",&t);
    while(t--)
    {
        int i,x,q,t,k,p;
        double ans;
        scanf("%d",&x);
        scanf("%d",&q);
        for(i=0; i<q; i++)
        {
            scanf("%d %d",&p,&t);
            switch(p)
            {
            case 1:
                ans=(double)(60-x)*t;
                break;
            case 2:
                ans=(double)t*3600/(60-x);
                break;
            case 3:
                ans=(double)2592000.00/x*t;
                break;
            default:
                break;
            }
            printf("%.2lf\n",ans);
        }
    }
    return 0;
}