1002. A+B for Polynomials

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

Input

Each input file contains one test case. Each case occupies 2 lines, and each line contains the information of a polynomial: K N1 a_N1 N2 a_N2 ... NK a_NK, where K is the number of nonzero terms in the polynomial, Ni and a_Ni (i=1, 2, ..., K) are the exponents and coefficients, respectively. It is given that 1 <= K <= 10，0 <= NK < ... < N2 < N1 <=1000.

Output

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.

#include <stdio.h>#include <stdlib.h>#define N 1000        int main (){    int num,i,index;    float rate;    float ratio[N+1]={0.0f};    scanf("%d",&num);    for (i=0;i<num;i++)     {        scanf("%d %f",&index,&rate);        ratio[index]+=rate;        }    scanf("%d",&num);    for (i=0;i<num;i++)     {        scanf("%d %f",&index,&rate);        ratio[index]+=rate;        }    int count=0;    for (i=0;i<=N;i++)    {        if(ratio[i]!=0.0f) count++;        }    printf("%d",count);    for( i=N;i>=0;i--)    {         if(ratio[i]!=0.0f)         printf(" %d %.1f",i,ratio[i]);         }    printf("\n");    system("pause");    return 0;    }