1002 A+B for Polynomials

#include <cstdio>
const int maxn = 1111;
double p[maxn] = { };
int main(){
    int k, n, count = 0;
    double a;
    scanf("%d", &k);
    for(int i = 0; i < k; i++){
        scanf("%d %lf", &n, &a);
        p[n] += a;
    }
    scanf("%d", &k);
    for(int i = 0; i < k; i++){
        scanf("%d %lf", &n, &a);
        p[n] += a;
    }
    for(int i = 0; i < maxn; i++){
        if(p[i] != 0){
            count++;
        }
    }
    
    printf("%d", count);
    for (int i = maxn - 1; i >= 0; i--) {
        if(p[i] != 0){
            printf(" %d %.1f", i, p[i]);
        }
    }
    return 0;
}