题解 | #合并表记录#
合并表记录
https://www.nowcoder.com/practice/de044e89123f4a7482bd2b214a685201
#include<iostream>
#include<unordered_map>
#include<map>
using namespace std;
int main()
{
map<int,int>nums;
int _key,_val;
int n = 0;
cin>>n;
for(int i = 0;i<n;i++){
cin>>_key>>_val;
nums[_key] += _val;
}
for(auto &s:nums){
cout<<s.first<<' '<<s.second<<endl;
}
}
