Submission #632026

#	Time	Username	Problem	Language	Result	Execution time	Memory
632026		BhavayGoyal	Hacker (BOI15_hac)	C++14	0 / 100	342 ms	24228 KiB

hac

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

#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;

template<class T> using oset = 
            tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;

#define ll long long
#define ld long double
#define ar array
#define vi vector<int>
#define vii vector<vector<int>>
#define pii pair<int, int>
#define pb push_back
#define all(x) x.begin(), x.end()
#define f first
#define s second
#define endl "\n"

const int MOD = 1e9+7;
const int inf = 1e9;
const ll linf = 1e18;

const int d4i[4]={-1, 0, 1, 0}, d4j[4]={0, 1, 0, -1};
const int d8i[8]={-1, -1, 0, 1, 1, 1, 0, -1}, d8j[8]={0, 1, 1, 1, 0, -1, -1, -1};

// -------------------------------------------------- Main Code --------------------------------------------------

void sol() {
    int n; cin >> n;
    int mid = (n+1)/2;
    ll arr[2*n];
    for (int i = 0; i < n; i++) {cin >> arr[i]; arr[i+n] = arr[i];}    
    for (int i = 1; i < 2*n; i++) arr[i] += arr[i-1];
    multiset<ll> st;
    queue<ll> q;
    for (int i = mid-1; i < n-1; i++) { int pSum = arr[i]; if (i >= mid) pSum -= arr[i-mid]; st.insert(pSum); q.push(pSum);}
    ll ans = *st.begin();
    for (int i = n-1; i < 2*n; i++) {
        st.erase(q.front()); q.pop();
        int pSum = arr[i] - arr[i-mid];
        st.insert(pSum);
        q.push(pSum);
        ans = max(ans, *st.begin());
    }
    cout << ans << endl;
}

int main () {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    int t = 1;
    // cin >> t; 
    while (t--) {
        sol();
    }
    return 0;
}

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