문제
풀이
#include <algorithm>
#include <iostream>
#include <vector>
using namespace std;
void solve(void) {
vector<long long> a(3), b(3);
for (int i=0; i<3; i++) cin >> a[i];
for (int i=0; i<3; i++) cin >> b[i];
sort(a.begin(), a.end());
sort(b.begin(), b.end());
cout << a[0] * b[0] + a[1] * b[1] + a[2] * b[2];
}
int main(void) {
ios::sync_with_stdio(false);
cin.tie(nullptr);
solve();
return 0;
}