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Submission #1007709

# Submission time Handle Problem Language Result Execution time Memory
1007709 2024-06-25T11:16:11 Z VMaksimoski008 Hacker (BOI15_hac) C++17
100 / 100
 397 ms 45992 KB 
#include <bits/stdc++.h>

#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
//#define int long long

using namespace std;

using ll = long long;
using pii = pair<int, int>;
using pll = pair<ll, ll>;

const int mod = 1e9 + 7;
const int LOG = 20;
const int maxn = 1e5 + 5;

struct SegTree {
    int n;
    vector<ll> tree, lazy;

    SegTree(int _n) : n(_n), tree(4*_n+5, 1e18), lazy(4*_n+5, 1e18) {}

    void push(int u, int tl, int tr) {
        if(lazy[u] == 1e18) return ;
        tree[u] = min(tree[u], lazy[u]);

        if(tl != tr) {
            lazy[2*u] = min(lazy[u], lazy[2*u+1]);
            lazy[2*u+1] = min(lazy[u], lazy[2*u+1]);
        }

        lazy[u] = 1e18;
    }

    void update(int u, int tl, int tr, int l, int r, ll v) {
        push(u, tl, tr);
        if(tl > tr || l > tr || tl > r) return ;

        if(l <= tl && tr <= r) {
            lazy[u] = min(lazy[u], v);
            push(u, tl, tr);
            return ;
        }

        int tm = (tl + tr) / 2;
        update(2*u, tl, tm, l, r, v);
        update(2*u+1, tm+1, tr, l, r, v);
        tree[u] = min(tree[2*u], tree[2*u+1]);
    }

    ll query(int u, int tl, int tr, int l, int r) {
        if(tl > tr || l > tr || tl > r) return 1e18;
        push(u, tl, tr);
        if(l <= tl && tr <= r) return tree[u];
        int tm = (tl + tr) / 2;
        return min(query(2*u, tl, tm, l, r), query(2*u+1, tm+1, tr, l, r));
    }

    void update(int l, int r, ll v) { update(1, 0, n-1, l, r, v); }
    ll query(int l, int r) { return query(1, 0, n-1, l, r); }
};

signed main() {
    int n;
    cin >> n;

    vector<int> v(n+1);
    for(int i=1; i<=n; i++) cin >> v[i];
    for(int i=1; i<=n; i++) v.push_back(v[i]);

    vector<ll> pref(2*n+1);
    for(int i=1; i<=2*n; i++) pref[i] = pref[i-1] + v[i];

    SegTree tree(n+1);
    int len = (n + 1) / 2;
    for(int i=1; i<=n; i++) {
        ll val = pref[i+len-1] - pref[i-1];
        if(i+len-1 <= n) tree.update(i, i+len-1, val);
        else {
            tree.update(i, n, val);
            tree.update(1, i+len-1-n, val);
        }
    }

    ll ans = 0;
    for(int i=1; i<=n; i++) ans = max(ans, tree.query(i, i));
    cout << ans << '\n';
    return 0;
}

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 344 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 436 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 360 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 344 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 436 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 360 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 1 ms 348 KB Output is correct
22 Correct 2 ms 604 KB Output is correct
23 Correct 3 ms 860 KB Output is correct
24 Correct 2 ms 604 KB Output is correct
25 Correct 3 ms 860 KB Output is correct
26 Correct 3 ms 860 KB Output is correct
27 Correct 0 ms 348 KB Output is correct
28 Correct 0 ms 348 KB Output is correct
29 Correct 0 ms 348 KB Output is correct
30 Correct 3 ms 860 KB Output is correct
31 Correct 3 ms 860 KB Output is correct

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 3 ms 860 KB Output is correct
4 Correct 61 ms 7596 KB Output is correct
5 Correct 140 ms 18408 KB Output is correct
6 Correct 186 ms 22952 KB Output is correct
7 Correct 227 ms 27584 KB Output is correct
8 Correct 374 ms 45488 KB Output is correct

Subtask #4
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 344 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 436 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 360 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 1 ms 348 KB Output is correct
22 Correct 2 ms 604 KB Output is correct
23 Correct 3 ms 860 KB Output is correct
24 Correct 2 ms 604 KB Output is correct
25 Correct 3 ms 860 KB Output is correct
26 Correct 3 ms 860 KB Output is correct
27 Correct 0 ms 348 KB Output is correct
28 Correct 0 ms 348 KB Output is correct
29 Correct 0 ms 348 KB Output is correct
30 Correct 3 ms 860 KB Output is correct
31 Correct 3 ms 860 KB Output is correct
32 Correct 0 ms 348 KB Output is correct
33 Correct 0 ms 348 KB Output is correct
34 Correct 3 ms 860 KB Output is correct
35 Correct 61 ms 7596 KB Output is correct
36 Correct 140 ms 18408 KB Output is correct
37 Correct 186 ms 22952 KB Output is correct
38 Correct 227 ms 27584 KB Output is correct
39 Correct 374 ms 45488 KB Output is correct
40 Correct 6 ms 1368 KB Output is correct
41 Correct 13 ms 2240 KB Output is correct
42 Correct 20 ms 3296 KB Output is correct
43 Correct 144 ms 18528 KB Output is correct
44 Correct 364 ms 45488 KB Output is correct
45 Correct 70 ms 9172 KB Output is correct
46 Correct 245 ms 27560 KB Output is correct
47 Correct 381 ms 45592 KB Output is correct
48 Correct 397 ms 45992 KB Output is correct
49 Correct 371 ms 45064 KB Output is correct
50 Correct 385 ms 44972 KB Output is correct