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    //Good luck

    include

    void update(int *a,int *b) { // Complete this function
    int c=*a,d=*b; *a=c+d; *b=c-d; if(*b<0) *b=-(*b);

    }

    int main() { int a, b; int *pa = &a, *pb = &b;

    scanf("%d %d", &a, &b);
    update(pa, pb);
    printf("%d\n%d", a, b);
    
    return 0;
    

    }