Submission #101227

#	Time	Username	Problem	Language	Result	Execution time	Memory
101227		Leonardo_Paes	Hacker (BOI15_hac)	C++11	60 / 100	135 ms	4328 KiB

hac

#include <bits/stdc++.h>

using namespace std;

const int MAXN = 5e5+10;

int vet[MAXN], pref[MAXN];

int main(){

    int n, k, resp=0x3f3f3f3f;

    cin >> n;

    k = ceil((double)n/2);

    for(int i=1; i<=n; i++){
        cin >> vet[i];
        pref[i]=vet[i]+pref[i-1];
    }
    if(n>5000){
         for(int i=1; i<=k; i++){
            int sum=0;

            sum += pref[i];

            sum += pref[n] - pref[n-(k-i)];

            resp = min(resp,sum);
        }
    }
    else{
        resp=0;
        for(int i=1; i<=n; i++){
            int p=0x3f3f3f3f;
            for(int j=0; j<k; j++){
                int sum=0, x=i+j;

                if(x>n)x-=n;

                if(x<=k){
                    sum+=pref[x];
                    sum+= pref[n] - pref[n-(k-x)];
                }
                else{
                    sum+=pref[x] - pref[x-k];
                }
                p = min(p,sum);
            }
            resp=max(resp,p);
        }
    }
    cout << resp << endl;
}

• Subtask 1: 20 / 20
• Subtask 2: 20 / 20
• Subtask 3: 20 / 20
• Subtask 4: 0 / 40