什么叫多项式！！！1002. A+B for Polynomials (25)

#include<stdio.h>
#include<string.h>
#include<algorithm>
using namespace std;
int main(){
int k,e;
double c;
double a[10010];
int ans = 0;
//	memset(v,0,sizeof(v));
memset(a,0,sizeof(a));
scanf("%d",&k);
while(k--){
scanf("%d%lf",&e,&c);
a[e]+=c;

}
scanf("%d",&k);
while(k--){
scanf("%d%lf",&e,&c);
a[e]+=c;
}
for(int i = 10009;i>=0;i--){
if(a[i])ans++;
}
printf("%d",ans);
for(int i = 10009;i>=0;i--){
if(a[i]){
printf(" %d %.1f",i,a[i]);
}
}
puts("");
return 0;
}