oj.uz

Submission #151363

# Submission time Handle Problem Language Result Execution time Memory
151363 2019-09-02T14:31:24 Z theboatman Bigger segments (IZhO19_segments) C++17
27 / 100
 230 ms 262144 KB 
#include <bits/stdc++.h>

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

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 * 12, 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 <long long> pref;

long long get(int l, int r) {
    long long 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 376 KB Output is correct
2 Correct 2 ms 504 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 504 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 376 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 504 KB Output is correct
13 Correct 2 ms 504 KB Output is correct
14 Correct 2 ms 508 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 376 KB Output is correct
2 Correct 2 ms 504 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 504 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 376 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 504 KB Output is correct
13 Correct 2 ms 504 KB Output is correct
14 Correct 2 ms 508 KB Output is correct
15 Correct 2 ms 504 KB Output is correct
16 Correct 62 ms 23928 KB Output is correct
17 Correct 60 ms 23928 KB Output is correct
18 Correct 59 ms 23928 KB Output is correct
19 Correct 56 ms 23928 KB Output is correct
20 Correct 64 ms 23900 KB Output is correct
21 Correct 61 ms 23928 KB Output is correct
22 Correct 39 ms 15480 KB Output is correct
23 Correct 21 ms 8824 KB Output is correct
24 Correct 60 ms 23928 KB Output is correct
25 Correct 68 ms 23992 KB Output is correct
26 Correct 66 ms 23928 KB Output is correct
27 Correct 58 ms 23928 KB Output is correct
28 Correct 76 ms 24056 KB Output is correct
29 Correct 64 ms 23928 KB Output is correct
30 Correct 59 ms 23928 KB Output is correct

Subtask #3
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 504 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 504 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 376 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 504 KB Output is correct
13 Correct 2 ms 504 KB Output is correct
14 Correct 2 ms 508 KB Output is correct
15 Correct 2 ms 504 KB Output is correct
16 Correct 62 ms 23928 KB Output is correct
17 Correct 60 ms 23928 KB Output is correct
18 Correct 59 ms 23928 KB Output is correct
19 Correct 56 ms 23928 KB Output is correct
20 Correct 64 ms 23900 KB Output is correct
21 Correct 61 ms 23928 KB Output is correct
22 Correct 39 ms 15480 KB Output is correct
23 Correct 21 ms 8824 KB Output is correct
24 Correct 60 ms 23928 KB Output is correct
25 Correct 68 ms 23992 KB Output is correct
26 Correct 66 ms 23928 KB Output is correct
27 Correct 58 ms 23928 KB Output is correct
28 Correct 76 ms 24056 KB Output is correct
29 Correct 64 ms 23928 KB Output is correct
30 Correct 59 ms 23928 KB Output is correct
31 Runtime error 230 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 376 KB Output is correct
2 Correct 2 ms 504 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 504 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 376 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 504 KB Output is correct
13 Correct 2 ms 504 KB Output is correct
14 Correct 2 ms 508 KB Output is correct
15 Correct 2 ms 504 KB Output is correct
16 Correct 62 ms 23928 KB Output is correct
17 Correct 60 ms 23928 KB Output is correct
18 Correct 59 ms 23928 KB Output is correct
19 Correct 56 ms 23928 KB Output is correct
20 Correct 64 ms 23900 KB Output is correct
21 Correct 61 ms 23928 KB Output is correct
22 Correct 39 ms 15480 KB Output is correct
23 Correct 21 ms 8824 KB Output is correct
24 Correct 60 ms 23928 KB Output is correct
25 Correct 68 ms 23992 KB Output is correct
26 Correct 66 ms 23928 KB Output is correct
27 Correct 58 ms 23928 KB Output is correct
28 Correct 76 ms 24056 KB Output is correct
29 Correct 64 ms 23928 KB Output is correct
30 Correct 59 ms 23928 KB Output is correct
31 Runtime error 230 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 376 KB Output is correct
2 Correct 2 ms 504 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 504 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 376 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 504 KB Output is correct
13 Correct 2 ms 504 KB Output is correct
14 Correct 2 ms 508 KB Output is correct
15 Correct 2 ms 504 KB Output is correct
16 Correct 62 ms 23928 KB Output is correct
17 Correct 60 ms 23928 KB Output is correct
18 Correct 59 ms 23928 KB Output is correct
19 Correct 56 ms 23928 KB Output is correct
20 Correct 64 ms 23900 KB Output is correct
21 Correct 61 ms 23928 KB Output is correct
22 Correct 39 ms 15480 KB Output is correct
23 Correct 21 ms 8824 KB Output is correct
24 Correct 60 ms 23928 KB Output is correct
25 Correct 68 ms 23992 KB Output is correct
26 Correct 66 ms 23928 KB Output is correct
27 Correct 58 ms 23928 KB Output is correct
28 Correct 76 ms 24056 KB Output is correct
29 Correct 64 ms 23928 KB Output is correct
30 Correct 59 ms 23928 KB Output is correct
31 Runtime error 230 ms 262144 KB Execution killed with signal 9 (could be triggered by violating memory limits)
32 Halted 0 ms 0 KB -