#include <stdio.h>
#include <stdlib.h>

	/* 1)

	n = 8
	u0 = 8,
	u1 = 8/2 = 4 car 8 est pair
	u2 = 4/2 = 2 
	u3 = 2/2 = 1

	n = 9
	u0 = 9
	u1 = 9*3+1 = 28 car 9 est impair
	u2 = 28/2 = 14 car 28 est pair
	u3 = 14/2 = 7
	u4 = 7*3+1 = 22
	u5 = 22/2 = 11
	u6 = 11*3+1 = 34
	u7 = 34/2 = 17
	u8 = 17*3+1 = 52
	u9 = 52/2 = 26
	u10 = 26/2 = 13
	u11 = 13*3+1 = 40
	u12 = 40/2 = 20
	u13 = 20/2 = 10
	u14 = 10/2 = 5
	u15= 3∗5 + 1 = 16
	u16= 16/2 = 8
	u17= 8/2 = 4
	u18= 4/2 = 2
	u19= 2/2 = 1 */

int main (void){
	int x;
	int i=0;
	int j;
	printf("Veuillez saisir un entier: ");
	scanf("%d", &x);
	printf("u0 = %d\n",x);
	while (1<x){
		if((x%2)==0){ //Permet de savoir si x est pair
			x=x/2;
			i++;
			printf("u%d = %d\n",i,x);
		} else{
			x=3*x+1;
			i++;
			printf("u%d = %d\n",i,x);
		}
	} printf("Il a fallut %d etapes pour obtenir 1.\n",i);

	for(j=0;j<101;j++){
		x=j;
		i=0;
		while (1<x){
			if((x%2)==0){ //Permet de savoir si x est pair
				x=x/2;
				i++;
			} else{
				x=3*x+1;
				i++;
			}
		} printf("La longueur de la suite pour x=%d est de %d\n",j,i);
	}
	return 0;
}