poj 1897 Data Mining

# include <stdio.h>int main(){    int n,i,bit=33,A=-1,B=-1;    long long res=0xfffffffffffffffll,sp,sq;    scanf("%d%lld%lld",&n,&sp,&sq);    if(n==1)     {       printf("%d 0 0n",sq);       return 0;    }    for(i=0;i<=bit;i++)    {         if(sp+(sp<<i)<sq) continue;         int b=0;         while(((sp+(sp<<i))>>b)>=sq) b++;         b--;         if(((sp*(n-1)+((sp*(n-1))<<i))>>b)+sq<res)   res=((sp*(n-1)+((sp*(n-1))<<i))>>b)+sq,A=i,B=b;    }    printf("%lld %d %dn",res,A,B);    return 0;}