#include <stdio.h>
#include <stdlib.h>
#include <string.h>
int main()
{
    int a[200]= {0},b[200]= {0},s[200]= {0},i,t=0;
    char x[200],y[200],z[200];
    printf("Primul numar = ");
    gets(x);
    printf("Al doilea numar = ");
    gets(y);
    a[0]=strlen(x);
    printf("Numarul de cifre pe care le are numarul a este: %d\n",a[0]);
    b[0]=strlen(y);
    printf("Numarul de cifre pe care le are numarul b este: %d\n",b[0]);
    printf("\n");
    if((a[0]<b[0])||(a[0]==b[0])&&(strcmp(x,y)<0))
    {
        strcpy(z,x);
        strcpy(x,y);
        strcpy(y,z);
        a[0] = strlen(x);
        b[0] = strlen(y);
    }
    if(a[0]>b[0]) s[0]=a[0];
    else s[0]=b[0];

    for(i=1; i<=a[0]; i++)
        a[i]=x[a[0]-i] - '0';

    for(i=a[0]; i>0; i--)
        printf("%d ",a[i]);
    printf("\n");

    for(i=1; i<=b[0]; i++)
        b[i]=y[b[0]-i]-'0';

    for(i=a[0]; i>0; i--)
        printf("%d ",b[i]);
    printf("\n");


    adunare(a,b);
    printf("\n");
    diferenta(a,b);


}

void adunare(int a[200], int b[200])
{
    int t = 0,i, s[200];
    s[0] = a[0];
    for(i=1; i<=s[0]; i++)
    {
        s[i]=(a[i]+b[i]+t)%10;
        t=(a[i]+b[i]+t)/10;
    }

    if (t)
    {
        s[0]++;
        s[s[0]]=t;
    }
    for(i=s[0]; i>0; i--)
        printf("%d ",s[i]);
    printf("\n");
}

void diferenta(int a[200], int b[200])
{

    int d[200];

    int i, t = 0;
    for(i = 1; i <= a[0]; i++)
    {
        d[i] = a[i] - b[i] + t;
        if(d[i] < 0)
        {

            d[i] += 10;
            t = -1;
        }
        else
            t = 0;
    }
    i--;
    while(i && !d[i])
        i--;
    if(i == 0)
    {
        for(i=a[0]; i>0; i--)
            printf("%d ",a[i]);
        printf("\n");
        for(i=a[0]; i>0; i--)
            printf("%d ",b[i]);
        printf("\n");
        printf("0");
    }
    else
    {
        d[0] = i;
        int j;
        for(i=a[0]; i>0; i--)
            printf("%d ",a[i]);
        printf("\n");
        for(i=a[0]; i>0; i--)
            printf("%d ",b[i]);
        printf("\n");
        for(i = d[0]; i > 0; i--)
            printf("%d ", d[i]);
        printf("\n");

    }



}