Submission #971123

#	Time	Username	Problem	Language	Result	Execution time	Memory
971123		Whisper	Hacker (BOI15_hac)	C++17	40 / 100	93 ms	11088 KiB

hac

#include <bits/stdc++.h>

using namespace std;
using ll = long long;

#define int long long
#define FOR(i, a, b) for (int i = a; i <= b; i++)
#define FORD(i, a, b) for (int i = b; i >= a; i --)
#define REP(i, n) for (int i = 0; i < n; ++i)
#define REPD(i, n) for (int i = n - 1; i >= 0; --i)

#define MASK(i) (1LL << (i))
#define BIT(x, i) (((x) >> (i)) & 1)

constexpr ll LINF = (1ll << 60);
constexpr int INF = (1ll << 30);
constexpr int Mod = 1e9 + 7;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

void setupIO(){
    #define name "Whisper"
    //Phu Trong from Nguyen Tat Thanh High School for gifted student
    srand(time(NULL));
    cin.tie(nullptr)->sync_with_stdio(false); cout.tie(nullptr);
    //freopen(name".inp", "r", stdin);
    //freopen(name".out", "w", stdout);
    cout << fixed << setprecision(10);
}

template <class X, class Y>
    bool minimize(X &x, const Y &y){
        X eps = 1e-9;
        if (x > y + eps) {x = y; return 1;}
        return 0;
    }

template <class X, class Y>
    bool maximize(X &x, const Y &y){
        X eps = 1e-9;
        if (x + eps < y) {x = y; return 1;}
        return 0;
    }
int nArr;
const int MAX = 5e5 + 5;

int A[MAX];

void Whisper(){
    cin >> nArr;
    for (int i = 1; i <= nArr; ++i) cin >> A[i], A[i + nArr] = A[i];
    int k = (nArr + 1) / 2;
    nArr *= 2;
    FOR(i, 1, nArr) A[i] += A[i - 1];
    int ans = 0;
    multiset<int> s;
    for (int i = 1; i <= nArr - k + 1; ++i){
        s.insert(A[i + k - 1] - A[i - 1]);
        if (i >= k){
            ans = max(ans, *s.begin());
            s.erase(s.find(A[i] - A[i - k]));
        }
    }
    cout << ans;
}


signed main(){
    setupIO();
    int Test = 1;
//    cin >> Test;
    for ( int i = 1 ; i <= Test ; i++ ){
        Whisper();
        if (i < Test) cout << '\n';
    }
}

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