제출 #676431

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
676431		Essa2006	Simfonija (COCI19_simfonija)	C++14	0 / 110	26 ms	3668 KiB

simfonija

#include<bits/stdc++.h>
using namespace std;
#define int long long 
#define endl '\n'
#define FF first
#define SS second
#define all(a) a.begin(), a.end()
#define mod (int)(1000000007)
signed main(){
    ios_base::sync_with_stdio(0);cin.tie(0);
    int n, k;
    cin>>n>>k;
    vector<int>A(n);
    for(int i=0;i<n;i++){
        cin>>A[i];
    }
    for(int i=0, a;i<n;i++){
        cin>>a;
        A[i]-=a;
    }
    sort(all(A));
    vector<int>Pre(n);
    Pre[0]=A[0];
    int ans=1e18;
    for(int i=1;i<n;i++)
        Pre[i]=Pre[i-1]+A[i];
    int md=(n-k)/2;
    for(int i=0, r=n-k-1;i<n;i++, r++){
        int ind=md+i, val=A[ind];
        int sum=(ind-i+1)*val-(Pre[ind]-(i?Pre[i-1]:0))+(r+1?Pre[r]:0)-Pre[ind]-val*(r-(ind+1)+1);
        ans=min(ans, sum);
    }
    cout<<ans;
}

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