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(甲) 1002 A+B for Polynomials

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

key 

#include <iostream>
#include <iomanip>
using namespace std;
int main()
{
	int count=2;
	double a[1005]={0};
	while(count--)
	{
		int k;
		cin>>k;
		int x;
		double y;
		while(k--)
		{
			cin>>x>>y;
			a[x]+=y;
		}
	}
	int noze=0;
	for(int i=0;i<1001;i++)
	{
		if(a[i]) noze++;
	}
	cout<<noze;
	for(int i=1001;i>=0;i--)
	{
		if(a[i]) cout<<" "<<i<<" "<<fixed<<setprecision(1)<<a[i];
	}
	return 0;
}