C :

#include<stdio.h>
int main()
{
    int t,n,i;
	scanf("%d",&t);
	while(t--)
	{
		scanf("%d",&n);
		for(i=0;n;n>>=1,i++);
		printf("%d\n",i);
	}
    return 0;
}

C++ :

#include <stdio.h>

int main() {
	int t, n, k;
	scanf("%d", &t);
	while (t--) {
		scanf("%d", &n);
		k = 0;
		while (n) {
			k++;
			n /= 2;
		}
		printf("%d\n", k);
	}
	return 0;
}

Java :

import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner in = new Scanner(System.in);
		int n = in.nextInt();
		for(int i=0;i<n;i++){
			int b = in.nextInt();
			System.out.println(ag(b));
		}
	}
	
	private static int ag(int a){
		if(a==1)return 1;
		return ag(a/2)+1;
	}

}