#include"stdio.h"
#include"stdlib.h"
1 : 1-0.166666*1 : 1-0.16666*(1-0.166666) -> wpb/k
*/
int main(){
int n,ps,wps;
double pb;
scanf("%d",&n);
for(;n;n--){
int i;
f loat k=1.0,j=1.0,wpb=1.0;
scanf("%d %lf %d",&ps,&pb,&wps);
for(i=1;i<ps;i++){
j=pb*j;
if( wps==(i+1))
wpb=1.0-j;
k+=(1.0-j);j=k;
}
if(pb)
printf("%.4lf\n",(wpb/k));
else
printf("0.0000\n");
}
}
創作內容
[UVA10056]What is the Probability?
CPE (1)