PAT 1002. A+B for Polynomials (25)

1002. A+B for Polynomials (25)

时间限制

400 ms

内存限制

65536 kB

代码长度限制

16000 B

判题程序

Standard

作者

CHEN, Yue

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.

Sample Input

2 1 2.4 0 3.22 2 1.5 1 0.5

Sample Output

3 2 1.5 1 2.9 0 3.2

#include<iostream>#include<cstdio>#include<map>using namespace std;map<int,double> a;int main(){                for(int i=0;i<2;i++)                {                                int n;                                scanf("%d",&n);                                for(int j=0;j<n;j++)                                {                                                int x;                                                double y;                                                scanf("%d %lf",&x,&y);                                                a[x]+=y;                                }                }                map<int,double>::reverse_iterator it;                int k=0;                for(it=a.rbegin();it!=a.rend();it++)                {                                if(it->second>1e-6||it->second<-1e-6)                                k++;                }                 printf("%d",k);                 for(it=a.rbegin();it!=a.rend();it++)                {                                if(it->second>1e-6||it->second<-1e-6)                          printf(" %d %.1lf",it->first,it->second);                }                printf("\n");                return 0;}