poj 3105 Expectation

#include <stdio.h>int main(){    int t,i,n,s;    double r,p;    scanf("%d",&t);    while(t--){        scanf("%d",&n);        r=0;        for(i=0;i<32;i++){ s=1<<i; p=((n/s>>1)*s+(((n&s)==0)?n%s:s))/(double)n; r+= 2*p*(1-p)*s;        }        printf("%.2lfn",r);    }    return 1;}