C :

#include<stdio.h>
int main(){
	double h=100.0;
	int n=0;
	while(h>=0.5){
		 h=h/2.0;
		 n++;
	}
	printf("%d",n);
	return 0;
}

C++ :

#include <iostream>
#include <iomanip>
#include <cmath>

using namespace std;

int main(){
	double s=100,c=0;
	for(int i=1;i<=1000000;i++){
		if(s>=0.5){
			s/=2;
			c++;
		}else{
			cout<<c;
			break;
		}
	}
}

Python :

n=100
s=0
while n>=0.5:
    n=n/2
    s+=1
print(s)