PAT (Advanced Level) Practise1002. 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

建立一个数组储存会出现的所有的情况，然后统计数字，进行输出就可以。

#include <iostream>using namespace std;int main(){//  freopen("111.txt", "r", stdin);  double num[1024]={0};  for(int i=0; i<2; i++){    int n;     cin >> n;    for(int j=0; j<n; j++){      int a;      double b;      cin >> a >> b;      num[a] += b;    }    }  int sum = 0;  for(int i=0; i<1001; i++){    if(num[i] != 0)      sum ++;  }  cout << sum;  for(int i=1000; i>=0; i--){    if(num[i] != 0){      printf(" %d %.1lf", i, num[i]);    }  }  cout << endl;   return 0;}