#include <stdio.h>
#include <stdlib.h>
typedef struct PolyNode *Polynomial;
struct PolyNode
{
int coef;
int expon;
Polynomial link;
};
Polynomial ReadPoly();
void Attach(int c, int e, Polynomial *pRear);
void PrintPoly(Polynomial P);
Polynomial Add(Polynomial P1, Polynomial P2);
Polynomial Mult(Polynomial P1, Polynomial P2);
int main()
{
Polynomial P1,P2,PP,PS;
P1 = ReadPoly();
P2 = ReadPoly();
PS = Mult(P1,P2);
PP = Add(P1, P2);
PrintPoly(PS);
PrintPoly(PP);
return 0;
}
void Attach(int c, int e, Polynomial *pRear)
{
Polynomial P;
P = (Polynomial)malloc(sizeof(struct PolyNode));
P->coef = c;
P->expon = e;
P->link = NULL;
(*pRear)->link = P;
*pRear = P;
}
Polynomial ReadPoly()
{
int N;
scanf("%d",&N);
int c, e;
Polynomial Rear, P, t;
P = (Polynomial)malloc(sizeof(struct PolyNode));
P->link = NULL;
Rear = P;
while (N--) {
scanf("%d %d",&c,&e);
Attach(c, e, &Rear);
}
t = P; P = P->link; free(t);
return P;
}
Polynomial Add(Polynomial P1, Polynomial P2)
{
Polynomial t1,t2,P,Rear;
t1 = P1;
t2 = P2;
P = (Polynomial)malloc(sizeof(struct PolyNode));
P->link = NULL;
Rear = P;
while (t1&&t2) {
if (t1->expon == t2->expon) {
if (t1->coef + t2->coef == 0) {
}else
{
Attach(t1->coef+t2->coef, t1->expon, &Rear);
}
t1 = t1->link;
t2 = t2->link;
}else if (t1->expon > t2->expon)
{
Attach(t1->coef, t1->expon, &Rear);
t1 = t1->link;
}else if(t1->expon < t2->expon)
{
Attach(t2->coef, t2->expon, &Rear);
t2 = t2->link;
}
}
while (t1) {
Attach(t1->coef, t1->expon, &Rear);
t1 = t1->link;
}
while (t2) {
Attach(t2->coef, t2->expon, &Rear);
t2 = t2->link;
}
Polynomial t = P;
P = P->link; free(t);
return P;
}
void PrintPoly(Polynomial P)
{
if (!P) {
printf("0 0\n");
return;
}
while (P->link) {
printf("%d %d ",P->coef,P->expon);
P = P->link;
}
printf("%d %d\n",P->coef,P->expon);
}
Polynomial Mult(Polynomial P1, Polynomial P2)
{
int flag = 1;
Polynomial t1, t2;
t1 = P1; t2 = P2;
Polynomial Result = NULL;
Polynomial t = NULL;
while (t1) {
Polynomial temp = (Polynomial)malloc(sizeof(struct PolyNode));
temp->link = NULL;
Polynomial nowRear = temp;
t2 = P2;
while (t2) {
Attach(t1->coef*t2->coef, t1->expon+t2->expon, &nowRear);
t2 = t2->link;
}
if (flag) {
flag = 0;
Result = temp->link;
}else
{
Result = Add(Result, temp->link);
while (temp) {
t = temp;
free(t);
temp = temp->link;
}
}
temp = nowRear = NULL;
t1 = t1->link;
}
return Result;
}