lab7p3

#include <stdio.h>

int p3(unsigned x[], unsigned nx, unsigned y[], unsigned ny, unsigned z[], unsigned nz)
{
    int i=0, n, ok=0, nr;
    if(nx+ny<nz+1)
        return -1;
    if(nx>ny)
    {
        n=ny;
        ok=1;
    }
    else
    {
        n=nx;
        ok=0;
    }
    for(i=n; i>0; i--)
    {
        if(x[i]+y[i]>=10)
        {
            z[i]=(x[i]+y[i])%10;
            z[i-1]=z[i-1]+1;
        }
        else
            z[i]=x[i]+y[i];
        nr++;
    }
    if(ok==1)
        for(i=nx; i>n; i--)
    {
        z[i]=x[i];
        nr++;
    }
    if(z[0]==1)
        nr++;
    return nr;
}

int main()
{
    unsigned x[10]={9, 5, 2, 1};
    unsigned y[10]={3, 2};
    unsigned z[10]={0, 0, 0, 0, 0};
    printf("%d", p3(x, 4, y, 2, z, 5));

    return 0;
}