ACMNB - ACM
Tác giả: happyboy99x
Ngôn ngữ: C++
#include<algorithm>
#include<iostream>
#include<numeric>
#include<vector>
using namespace std;
int main() {
int n; cin >> n;
vector<int> v;
int res = 0;
for(int i = 0, a, b; i < 2 * n; ++i) {
cin >> a >> b;
res += a;
v.push_back(b - a);
}
sort(v.begin(), v.end());
cout << res + accumulate(v.begin(), v.begin() + n, 0) << '\n';
return 0;
}