题解 | #合并表记录#
合并表记录
https://www.nowcoder.com/practice/de044e89123f4a7482bd2b214a685201
#include<iostream> #include<map> using namespace std; int main(){ int n; cin >> n; map<int,int> dict; int a,b; while(n--){ cin >> a >> b; dict[a]+=b; } for(auto x:dict){ cout << x.first << " " << x.second << endl; } }
利用map的有序性