题解 | #合并表记录#现学的map
合并表记录
http://www.nowcoder.com/practice/de044e89123f4a7482bd2b214a685201
#include<iostream>
#include<map>
using namespace std;
int main(){
map<int,int> m;
int n,x,y;
cin>>n;
for(int i = 0;i < n;i++){
cin>>x>>y;
m[x] += y;
}
for(auto i : m){
cout<<i.first<<" "<<i.second<<endl;
}
}