#include<vector>#include<algorithm>
using namespace std;
bool compare(int i, int j){ // 내림차순 정렬을 위한 함수
return j<i;
}
int solution(vector<int> A, vector<int> B)
{
int answer = 0;
sort(A.begin(),A.end());
sort(B.begin(),B.end(), compare);
for(int i=0;i<A.size();i++){
answer+=A[i]*B[i];
}
return answer;
}