1002 A+B for Polynomials （25）

This time, you are supposed to find A+B where A and B are two polynomials.

Input Specification:

Each input file contains one test case. Each case occupies 2 lines, and each line contains the information of a polynomial:

K N​1​​ a​N​1​​​​ N​2​​ a​N​2​​​​ ... N​K​​ a​N​K​​​​

where K is the number of nonzero terms in the polynomial, N​i​​ and a​N​i​​​​ (i=1,2,⋯,K) are the exponents and coefficients, respectively. It is given that 1≤K≤10，0≤N​K​​<⋯<N​2​​<N​1​​≤1000.

Output Specification:

For each test case you should output the sum of A and B in one line, with the same format as the input. Notice that there must be NO extra space at the end of each line. Please be accurate to 1 decimal place.

Sample Input:

2 1 2.4 0 3.2
2 2 1.5 1 0.5

Sample Output:

3 2 1.5 1 2.9 0 3.2

#include<cstdio>
int main()
{
	int K,ex,count=0;
	double co;
	double A[1001]={0};
	scanf("%d",&K);
	for(int i=0;i<K;i++) 
	{
		scanf("%d %lf",&ex,&co);
		A[ex]+=co;
		
	}
	scanf("%d",&K);
	for(int i=0;i<K;i++) 
	{
		scanf("%d %lf",&ex,&co);
		A[ex]+=co;	
	}
	for(int i=0;i<1001;i++)
	{
		if(A[i]!=0)count++;
	}
	printf("%d",count);
	for(int i=1000;i>=0;i--)
	{
		if(A[i]!=0)printf(" %d %.1f",i,A[i]);
	}
	return 0;
}