【1002】 A+B for Polynomials (25 分)

 

 1 //1002  A+B for Polynomials (25 分)
 2 #include<iostream>
 3 #include<iomanip>
 4 using namespace std;
 5 double a[1001] = { 0 };
 6 int main() {
 7     int k,n,count=0;
 8     double x;
 9     int group = 2;
10     while (group--) {
11         cin >> k;
12         for (int i = 0; i < k; i++) {
13             cin >> n >> x;
14             a[n] += x;
15         }
16     }
17     for (int i = 0; i < 1001; i++) {
18         if(a[i]!=0)
19             count++;
20     }
21     cout << count;
22     for (int i = 1000; i >= 0; i--) {
23         if (a[i] != 0)
24             cout << " " << i << " "<< setiosflags(ios::fixed) << setprecision(1) << a[i];
25     }
26     return 0;
27 
28 }