UVA 11636

https://odzkskevi.qnssl.com/8d68abfe6e32509b1c446b13c725b0e4?v=1501696926

#include <stdio.h>
#include <iostream>
using namespace std;

int main(void){
    long n,t,step,ans;
    ans=1;
    while(scanf("%ld",&n)==1){
        if(n<0) break;
        t=1;
        step=0;
        while(t<n){
            t=t<<1;
            step++;
        }
        printf("Case %ld: %ld
",ans++,step);
    }
    return 0;
}

#include <iostream>
#include <stdio.h>
using namespace std;
int main(){
    int n,Case=1;
    while(scanf("%d",&n)==1&&n>0){
        int temp=1,ans=0;
        if(temp<n){
            temp*=2;
            ans++;
        }
        printf("Case %d: %d
",Case++,ans);
    }
    return 0;
}