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 <stdio.h>
int main(){
  int k,e,i;
  float c;
  int count=0;
  float sum[1001]={0};
  scanf("%d",&k);
  for(i=0;i<k;i++){
    scanf("%d%f",&e,&c);
    sum[e]+=c;
  }
  scanf("%d",&k);
  for(i=0;i<k;i++){
    scanf("%d%f",&e,&c);
    sum[e]+=c;
  }
  for(i=0;i<1001;i++)
    if(sum[i]!=0)count++;
  printf("%d",count);
  for(i=1000;i>=0;i--)
    if(sum[i]!=0)
      printf(" %d %.1f",i,sum[i]);
}