ZOJ2722Head-to-Head Match

#include<fstream>#include<iostream>#include<cmath>using namespace std;int main(){//ifstream cin("acmilan.txt");double i,n,count;while(cin>>n){if(n==0)break;count=0;for(i=0;i<32;i++){if(pow(2,i)>=n){count=i;break;}}cout<<count<<endl;}//system("pause");return 0;}