题目链接：https://pintia.cn/problem-sets/994805342720868352/problems/994805526272000000
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
| #include <iostream>
#include "cstdio"
#include "map"
using namespace std;
int main() {
int k;
map<int, float, greater<int>> nums;
cin>>k;
int exp, count = 0;
float coef;
for (int i = 0; i < k; ++i) {
cin>>exp>>coef;
nums.insert({exp,coef});
}
cin>>k;
for (int i = 0; i < k; ++i) {
cin>>exp>>coef;
if (nums.find(exp) != nums.end()) {
nums.find(exp)->second += coef;
}else{
nums.insert({exp,coef});
}
}
for(auto &t: nums){
if (t.second != 0){
count++;
}
}
cout<<count;
for(auto &t: nums){
if (t.second != 0) {
printf(" %d %.1lf", t.first, t.second);
}
}
return 0;
}
|