#include <iostream>#include <cstdio>#include <cstdlib>using namespace std;int main() {    float A[1001] = {0};    float B[1001] = {0};    int k;    cin >> k;    float c;    int e;    for (int i = 0; i < k; i++) {        cin >> e >> c;        A[e] = c;    }    cin >> k;    for (int i = 0; i < k; i++) {        cin >> e >> c;        B[e] = c;    }        int nonzeor__cnt = 0;    for (int i = 0; i < 1001; i++) {        A[i] = A[i] + B[i];        if (A[i]) nonzeor__cnt++;    }   PRintf("%d%s",nonzeor__cnt,((nonzeor__cnt == 0)? "" : " "));    int cnt = 0;    for (int i = 1000; i >= 0; i--) {        if (A[i]) {            cnt++;            printf("%d %.1f%s",i,A[i],(cnt < nonzeor__cnt ? " " : ""));        }    }    system("pause");    return 0;}