8.7

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

int isInVec(int *vect, int vectLengt, int elementCautat) {
    int i;
    for (i = 0; i < vectLengt; i++)
        if (vect[i] == elementCautat)
            return 1;
    return 0;
}

int comune(int nVec, ...)
{
    va_list argument;           //declaram variabila de tip va_list
    int  **vectors, *lenghtVectors;
    int i, j, nrElementeCom = 0;
    vectors = (int **)malloc(sizeof(int*) * nVec);
    lenghtVectors = (int *)malloc(sizeof(int) * nVec);
    va_start(argument, nVec);   //apelam va_start() si o initializam
    for (i = 0; i < nVec; i++) {
        vectors[i] = va_arg(argument, int *);
        lenghtVectors[i] = va_arg(argument, int );
    }
    va_end(argument);
    for (i = 0; i < lenghtVectors[0]; i++) {
        j = 1;
        while (j < nVec && isInVec(vectors[j], lenghtVectors[j], vectors[0][i]))
            j++;
        if (j == nVec)
            nrElementeCom++;
    }


    return nrElementeCom;             // terminare parcurgere + eliberare memorie

}

int main(void){
    int v1[] = { 5, 8 , 3 , 0};
    int v2[] = { 8, 3, 5 };
    int v3[] = { 5, 0, 8 , 3};
    printf("%d", comune(3, v1, 2, v2, 3, v3, 3));
    scanf("%*c");
    return 0;
}