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

int main()
{
    int variable1 = 1;
    int variable2 = 1;
    int i = 2;
    int fin = 0;
    printf("Quelle occurence recherchez vous ?");
    scanf("%d", &fin);
    while(i<fin)
    {
        variable1 = variable1 + variable2;
        i++;
        variable2 = variable1 + variable2;
        i++;
    }
    if(fin%2==0)
    {
        printf("La %d eme occurence est : %d", fin, variable2);
    }
    else
    {
        printf("La %d eme occurence est : %d", fin, variable1);
    }
    return 0;
}