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> mymap;
while (n--)
{
int a, b;
cin >> a >> b;
mymap[a] += b;
}
for (auto it : mymap)
{
cout << it.first << " " << it.second << endl;
}
}
map 默认按照key升序排列
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