Submission #137482

#	Time	Username	Problem	Language	Result	Execution time	Memory
137482		silxikys	Hacker (BOI15_hac)	C++14	0 / 100	2 ms	376 KiB

hac

#include <bits/stdc++.h>
using namespace std;
using ll = long long;

const int maxn = 5e5+5;
int n, v[maxn], pre[maxn];

int main()
{
    ios_base::sync_with_stdio(false); cin.tie(NULL);
    cin >> n;
    for (int i = 0; i < n; i++) {
        cin >> v[i];
    }
    pre[0] = v[0];
    for (int i = 1; i < n; i++) {
        pre[i] = pre[i-1] + v[i];
    }
    int sz = (n+1)/2;
    vector<int> sums;
    for (int i = 0; i < n; i++) {
        int l = (i-sz+n) % n;
        if (l < i) {
            sums.push_back(pre[i]-pre[l]);
        }
        else {
            sums.push_back(pre[n-1] - (pre[l]-pre[i]));
        }
    }
    sort(sums.begin(),sums.end());
    /*
    for (int j: sums) {
        cout << j << ' ';
    }
    cout << '\n';
    */
    cout << sums[n/2] << '\n';
}

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