oj.uz

Submission #151354

# Submission time Handle Problem Language Result Execution time Memory
151354 2019-09-02T14:23:31 Z theboatman Bigger segments (IZhO19_segments) C++17
27 / 100
 206 ms 262144 KB 
#include <bits/stdc++.h>

#define y1 theboatman
#define make_struct(args...) {args}

#define int ll

using namespace std;

typedef long long ll;

const long long INF = 1e18 + 10;
const int inf = 1e9 + 10;
const int N = 1e6 + 10;

struct tree {
    struct node {
        int mx, add;
    };

    int v, tl, tr;
    vector <node> t;

    void build(int n) {
         v = 1;
         tl = 0;
         tr = n - 1;

         t.assign(n * 10, make_struct(-inf, -inf));
    }

    void push(int v) {
        t[v * 2].add = max(t[v * 2].add, t[v].add);
        t[v * 2 + 1].add = max(t[v * 2 + 1].add, t[v].add);
    }

    void modify(int v, int tl, int tr, int l, int r, int x) {
        if (l > r) {
            return;
        }

        if (tl == l && tr == r) {
            t[v].add = max(t[v].add, x);
            return;
        }

        int tm = (tl + tr) / 2;
        modify(v * 2, tl, tm, l, min(r, tm), x);
        modify(v * 2 + 1, tm + 1, tr, max(l, tm + 1), r, x);
    }

    int get(int v, int tl, int tr, int pos) {
        push(v);

        if (tl == tr) {
            return t[v].add;
        }

        int tm = (tl + tr) / 2;
        if (pos <= tm) {
            return get(v * 2, tl, tm, pos);
        }
        else {
            return get(v * 2 + 1, tm + 1, tr, pos);
        }
    }

    int get(int pos) {
        return get(v, tl, tr, pos);
    }

    void modify(int l, int r, int x) {
        modify(v, tl, tr, l, r, x);
    }
};

tree dp[3010];
vector <int> pref;

int get(int l, int r) {
    int res = pref[r];

    return (l ? res - pref[l - 1] : res);
}

int32_t main() {
    cin.tie(0);
    ios::sync_with_stdio(0);

    int n;
    cin >> n;

    vector <int> a(n);
    for(int i = 0; i < n; i++) {
        cin >> a[i];
    }

    for(int i = 0; i < n; i++) {
        dp[i].build(n);
    }

    dp[0].modify(0, n - 1, 1);

    pref.resize(n);
    for(int i = 0; i < n; i++) {
        pref[i] = (i ? pref[i - 1] + a[i] : a[i]);
    }


    for(int i = 0; i < n; i++) {
        for(int j = i; j < n; j++) {
            int l = j + 1, r = n;
            while(l < r) {
                int c = (l + r) / 2;
                if (get(i, j) > get(j + 1, c)) {
                    l = c + 1;
                }
                else {
                    r = c;
                }
            }

//            l = j + 1;
//            while(l < n && get(i, j) > get(j + 1, l)) {
//                l++;
//            }

            //cout << i << " " << j << " " << dp[i].get(j) + 1 << " " << l << " " << n - 1 << "\n";
            dp[j + 1].modify(l, n - 1, dp[i].get(j) + 1);
        }
    }

    int ans = 0;
    for(int i = 0; i < n; i++) {
        for(int j = 0; j < n; j++) {
            ans = max(ans, dp[i].get(j));
        }
    }

    cout << ans << "\n";
    return 0;
}
/*
*/

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 504 KB Output is correct
2 Correct 2 ms 508 KB Output is correct
3 Correct 2 ms 504 KB Output is correct
4 Correct 2 ms 508 KB Output is correct
5 Correct 2 ms 504 KB Output is correct
6 Correct 2 ms 504 KB Output is correct
7 Correct 2 ms 504 KB Output is correct
8 Correct 2 ms 504 KB Output is correct
9 Correct 2 ms 504 KB Output is correct
10 Correct 2 ms 504 KB Output is correct
11 Correct 2 ms 504 KB Output is correct
12 Correct 2 ms 636 KB Output is correct
13 Correct 2 ms 504 KB Output is correct
14 Correct 2 ms 504 KB Output is correct
15 Correct 2 ms 504 KB Output is correct

Subtask #2
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 504 KB Output is correct
2 Correct 2 ms 508 KB Output is correct
3 Correct 2 ms 504 KB Output is correct
4 Correct 2 ms 508 KB Output is correct
5 Correct 2 ms 504 KB Output is correct
6 Correct 2 ms 504 KB Output is correct
7 Correct 2 ms 504 KB Output is correct
8 Correct 2 ms 504 KB Output is correct
9 Correct 2 ms 504 KB Output is correct
10 Correct 2 ms 504 KB Output is correct
11 Correct 2 ms 504 KB Output is correct
12 Correct 2 ms 636 KB Output is correct
13 Correct 2 ms 504 KB Output is correct
14 Correct 2 ms 504 KB Output is correct
15 Correct 2 ms 504 KB Output is correct
16 Correct 79 ms 39664 KB Output is correct
17 Correct 74 ms 39680 KB Output is correct
18 Correct 77 ms 39676 KB Output is correct
19 Correct 77 ms 39556 KB Output is correct
20 Correct 84 ms 39708 KB Output is correct
21 Correct 78 ms 39672 KB Output is correct
22 Correct 49 ms 25464 KB Output is correct
23 Correct 35 ms 14584 KB Output is correct
24 Correct 78 ms 39620 KB Output is correct
25 Correct 79 ms 39672 KB Output is correct
26 Correct 83 ms 39672 KB Output is correct
27 Correct 77 ms 39544 KB Output is correct
28 Correct 87 ms 39772 KB Output is correct
29 Correct 80 ms 39568 KB Output is correct
30 Correct 76 ms 39672 KB Output is correct

Subtask #3
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 504 KB Output is correct
2 Correct 2 ms 508 KB Output is correct
3 Correct 2 ms 504 KB Output is correct
4 Correct 2 ms 508 KB Output is correct
5 Correct 2 ms 504 KB Output is correct
6 Correct 2 ms 504 KB Output is correct
7 Correct 2 ms 504 KB Output is correct
8 Correct 2 ms 504 KB Output is correct
9 Correct 2 ms 504 KB Output is correct
10 Correct 2 ms 504 KB Output is correct
11 Correct 2 ms 504 KB Output is correct
12 Correct 2 ms 636 KB Output is correct
13 Correct 2 ms 504 KB Output is correct
14 Correct 2 ms 504 KB Output is correct
15 Correct 2 ms 504 KB Output is correct
16 Correct 79 ms 39664 KB Output is correct
17 Correct 74 ms 39680 KB Output is correct
18 Correct 77 ms 39676 KB Output is correct
19 Correct 77 ms 39556 KB Output is correct
20 Correct 84 ms 39708 KB Output is correct
21 Correct 78 ms 39672 KB Output is correct
22 Correct 49 ms 25464 KB Output is correct
23 Correct 35 ms 14584 KB Output is correct
24 Correct 78 ms 39620 KB Output is correct
25 Correct 79 ms 39672 KB Output is correct
26 Correct 83 ms 39672 KB Output is correct
27 Correct 77 ms 39544 KB Output is correct
28 Correct 87 ms 39772 KB Output is correct
29 Correct 80 ms 39568 KB Output is correct
30 Correct 76 ms 39672 KB Output is correct
31 Runtime error 206 ms 262144 KB Execution killed with signal 9 (could be triggered by violating memory limits)
32 Halted 0 ms 0 KB -

Subtask #4
0 / 36.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 504 KB Output is correct
2 Correct 2 ms 508 KB Output is correct
3 Correct 2 ms 504 KB Output is correct
4 Correct 2 ms 508 KB Output is correct
5 Correct 2 ms 504 KB Output is correct
6 Correct 2 ms 504 KB Output is correct
7 Correct 2 ms 504 KB Output is correct
8 Correct 2 ms 504 KB Output is correct
9 Correct 2 ms 504 KB Output is correct
10 Correct 2 ms 504 KB Output is correct
11 Correct 2 ms 504 KB Output is correct
12 Correct 2 ms 636 KB Output is correct
13 Correct 2 ms 504 KB Output is correct
14 Correct 2 ms 504 KB Output is correct
15 Correct 2 ms 504 KB Output is correct
16 Correct 79 ms 39664 KB Output is correct
17 Correct 74 ms 39680 KB Output is correct
18 Correct 77 ms 39676 KB Output is correct
19 Correct 77 ms 39556 KB Output is correct
20 Correct 84 ms 39708 KB Output is correct
21 Correct 78 ms 39672 KB Output is correct
22 Correct 49 ms 25464 KB Output is correct
23 Correct 35 ms 14584 KB Output is correct
24 Correct 78 ms 39620 KB Output is correct
25 Correct 79 ms 39672 KB Output is correct
26 Correct 83 ms 39672 KB Output is correct
27 Correct 77 ms 39544 KB Output is correct
28 Correct 87 ms 39772 KB Output is correct
29 Correct 80 ms 39568 KB Output is correct
30 Correct 76 ms 39672 KB Output is correct
31 Runtime error 206 ms 262144 KB Execution killed with signal 9 (could be triggered by violating memory limits)
32 Halted 0 ms 0 KB -

Subtask #5
0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 504 KB Output is correct
2 Correct 2 ms 508 KB Output is correct
3 Correct 2 ms 504 KB Output is correct
4 Correct 2 ms 508 KB Output is correct
5 Correct 2 ms 504 KB Output is correct
6 Correct 2 ms 504 KB Output is correct
7 Correct 2 ms 504 KB Output is correct
8 Correct 2 ms 504 KB Output is correct
9 Correct 2 ms 504 KB Output is correct
10 Correct 2 ms 504 KB Output is correct
11 Correct 2 ms 504 KB Output is correct
12 Correct 2 ms 636 KB Output is correct
13 Correct 2 ms 504 KB Output is correct
14 Correct 2 ms 504 KB Output is correct
15 Correct 2 ms 504 KB Output is correct
16 Correct 79 ms 39664 KB Output is correct
17 Correct 74 ms 39680 KB Output is correct
18 Correct 77 ms 39676 KB Output is correct
19 Correct 77 ms 39556 KB Output is correct
20 Correct 84 ms 39708 KB Output is correct
21 Correct 78 ms 39672 KB Output is correct
22 Correct 49 ms 25464 KB Output is correct
23 Correct 35 ms 14584 KB Output is correct
24 Correct 78 ms 39620 KB Output is correct
25 Correct 79 ms 39672 KB Output is correct
26 Correct 83 ms 39672 KB Output is correct
27 Correct 77 ms 39544 KB Output is correct
28 Correct 87 ms 39772 KB Output is correct
29 Correct 80 ms 39568 KB Output is correct
30 Correct 76 ms 39672 KB Output is correct
31 Runtime error 206 ms 262144 KB Execution killed with signal 9 (could be triggered by violating memory limits)
32 Halted 0 ms 0 KB -