#include <bits/stdc++.h>
using namespace std;
#define rep(i,n) for(int i=0;i<(int)(n);i++)
#define all(vec) vec.begin(),vec.end()
#define int long long

bool chmin(int &a,int b){if(a>b){a=b;return true;}return false;}

signed main(){
    int n;cin>>n;
    int m[n];
    rep(i,n)cin>>m[i];
    int bits=1;
    rep(i,n)bits*=2;
    int dp[bits];
    fill(dp,dp+bits,(1LL<<60));
    dp[0]=0;
    rep(b,bits-1){
        rep(i,n){
            if(b&(1<<i))continue;
            int teka=0;
            rep(j,n)if(b&(1<<j))teka+=m[j];
            chmin(dp[b|(1<<i)],dp[b]+max(m[i]-teka%1000,0LL));
        }
    }
    cout<<dp[bits-1]<<endl;
}