oj.uz

Submission #231470

# Submission time Handle Problem Language Result Execution time Memory
231470 2020-05-13T17:20:12 Z _fractal Bigger segments (IZhO19_segments) C++14
73 / 100
 623 ms 56184 KB 
#include <bits/stdc++.h>

#define file ""

#define all(x) x.begin(), x.end()

#define sc second
#define fr first

#define pb push_back
#define mp make_pair

#define pss pair < line * , line * > 
#define pptreap pair < treap * , treap * >

    using namespace std;
using namespace __gnu_cxx;

typedef long long ll;
typedef pair <int, int> pii;
typedef pair <ll, ll> pll;

const ll inf = 1e16;
const int MOD = 1e9 + 7;

int const N = 7e6;

struct treap {
    ll x, y;
    pll mx, val;
    treap *l, *r;
    treap(ll new_x, ll new_mx, ll pos) {
        x = new_x;
        y = (rand() << 16) | rand();
        mx = {new_mx, pos};
        val = {new_mx, pos};
        l = r = nullptr;
    }
};

pll getmx(treap *a) {
    if (a == nullptr)
        return {0, 0};
    return a->mx;
}

void update(treap *&a) {
    a->mx = max(a->val, max(getmx(a->l), getmx(a->r)));
}

treap * merge(treap *t1, treap *t2) {
    if (t1 == nullptr)
        return t2;
    if (t2 == nullptr)
        return t1;
    if (t1->y > t2->y) {
        t1->r = merge(t1->r, t2);
        update(t1);
        return t1;
    } else {
        t2->l = merge(t1, t2->l);
        update(t2);
        return t2;
    }
}

pptreap split(treap *t, ll k) {
    if (t == nullptr)
        return mp(nullptr, nullptr);
    if (t->x <= k) {
        pptreap cnt = split(t->r, k);
        t->r = cnt.fr;
        update(t);
        return mp(t, cnt.sc);
    } else {
        pptreap cnt = split(t->l, k);
        t->l = cnt.sc;
        update(t);
        return mp(cnt.fr, t);
    }
}

bool exist(treap *t, ll pos, pll new_val) {
	if (t == nullptr)
		return 0;
	if (pos < t->x)
		return exist(t->l, pos, new_val);
	if (pos > t->x)
		return exist(t->r, pos, new_val);
	if (pos == t->x) {
		t->val = max(t->val, new_val);
		t->mx = max(t->mx, t->val);
		return 1;
	}
	update(t);
}

void data() {
    #ifdef PC
        freopen("rofl.in", "r", stdin);
        freopen("rofl.out", "w", stdout);
    #endif
}

int main() {
	data();
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    srand(time(nullptr));
	int n;
    cin >> n;
    vector < ll > a(n + 1);
    for (int i = 1; i <= n; i++)
        cin >> a[i];
    vector < ll > dp(n + 1), sum(n + 1), pref(n + 1);
    for (int i = 1; i <= n; i++)
        pref[i] = pref[i - 1] + a[i];
    treap * t = new treap(0, 0, 0);
    for (int i = 1; i <= n; i++) {
        pptreap k = split(t, pref[i]);
        pii pos = getmx(k.fr);
        t = merge(k.fr, k.sc);

        dp[i] = pos.fr + 1;
        sum[i] = pref[i] - pref[pos.sc];

        treap * nw = new treap(sum[i] + pref[i], dp[i], i);

		if (!exist(t, sum[i] + pref[i], mp(dp[i], i))) {
	        k = split(t, sum[i] + pref[i]);
	        t = merge(merge(k.fr, nw), k.sc);			
		}
    }
    cout << dp[n];
    return 0;
}

Compilation message

segments.cpp: In function 'bool exist(treap*, ll, pll)':
segments.cpp:96:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 4 ms 384 KB Output is correct
3 Correct 4 ms 384 KB Output is correct
4 Correct 4 ms 384 KB Output is correct
5 Correct 5 ms 384 KB Output is correct
6 Correct 5 ms 384 KB Output is correct
7 Correct 5 ms 384 KB Output is correct
8 Correct 4 ms 384 KB Output is correct
9 Correct 5 ms 384 KB Output is correct
10 Correct 5 ms 384 KB Output is correct
11 Correct 4 ms 384 KB Output is correct
12 Correct 5 ms 384 KB Output is correct
13 Correct 4 ms 384 KB Output is correct
14 Correct 5 ms 384 KB Output is correct
15 Correct 4 ms 384 KB Output is correct

Subtask #2
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 4 ms 384 KB Output is correct
3 Correct 4 ms 384 KB Output is correct
4 Correct 4 ms 384 KB Output is correct
5 Correct 5 ms 384 KB Output is correct
6 Correct 5 ms 384 KB Output is correct
7 Correct 5 ms 384 KB Output is correct
8 Correct 4 ms 384 KB Output is correct
9 Correct 5 ms 384 KB Output is correct
10 Correct 5 ms 384 KB Output is correct
11 Correct 4 ms 384 KB Output is correct
12 Correct 5 ms 384 KB Output is correct
13 Correct 4 ms 384 KB Output is correct
14 Correct 5 ms 384 KB Output is correct
15 Correct 4 ms 384 KB Output is correct
16 Correct 5 ms 384 KB Output is correct
17 Correct 5 ms 384 KB Output is correct
18 Correct 5 ms 384 KB Output is correct
19 Correct 5 ms 384 KB Output is correct
20 Correct 5 ms 384 KB Output is correct
21 Correct 5 ms 384 KB Output is correct
22 Correct 5 ms 384 KB Output is correct
23 Correct 5 ms 384 KB Output is correct
24 Correct 5 ms 384 KB Output is correct
25 Correct 5 ms 384 KB Output is correct
26 Correct 5 ms 384 KB Output is correct
27 Correct 5 ms 384 KB Output is correct
28 Correct 5 ms 384 KB Output is correct
29 Correct 5 ms 384 KB Output is correct
30 Correct 5 ms 384 KB Output is correct

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 4 ms 384 KB Output is correct
3 Correct 4 ms 384 KB Output is correct
4 Correct 4 ms 384 KB Output is correct
5 Correct 5 ms 384 KB Output is correct
6 Correct 5 ms 384 KB Output is correct
7 Correct 5 ms 384 KB Output is correct
8 Correct 4 ms 384 KB Output is correct
9 Correct 5 ms 384 KB Output is correct
10 Correct 5 ms 384 KB Output is correct
11 Correct 4 ms 384 KB Output is correct
12 Correct 5 ms 384 KB Output is correct
13 Correct 4 ms 384 KB Output is correct
14 Correct 5 ms 384 KB Output is correct
15 Correct 4 ms 384 KB Output is correct
16 Correct 5 ms 384 KB Output is correct
17 Correct 5 ms 384 KB Output is correct
18 Correct 5 ms 384 KB Output is correct
19 Correct 5 ms 384 KB Output is correct
20 Correct 5 ms 384 KB Output is correct
21 Correct 5 ms 384 KB Output is correct
22 Correct 5 ms 384 KB Output is correct
23 Correct 5 ms 384 KB Output is correct
24 Correct 5 ms 384 KB Output is correct
25 Correct 5 ms 384 KB Output is correct
26 Correct 5 ms 384 KB Output is correct
27 Correct 5 ms 384 KB Output is correct
28 Correct 5 ms 384 KB Output is correct
29 Correct 5 ms 384 KB Output is correct
30 Correct 5 ms 384 KB Output is correct
31 Correct 6 ms 640 KB Output is correct
32 Correct 7 ms 768 KB Output is correct
33 Correct 7 ms 640 KB Output is correct
34 Correct 7 ms 768 KB Output is correct
35 Correct 6 ms 640 KB Output is correct
36 Correct 7 ms 640 KB Output is correct
37 Correct 6 ms 640 KB Output is correct
38 Correct 6 ms 640 KB Output is correct
39 Correct 7 ms 640 KB Output is correct
40 Correct 7 ms 640 KB Output is correct
41 Correct 6 ms 640 KB Output is correct
42 Correct 6 ms 640 KB Output is correct
43 Correct 6 ms 640 KB Output is correct
44 Correct 7 ms 640 KB Output is correct
45 Correct 6 ms 768 KB Output is correct

Subtask #4
36.0 / 36.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 4 ms 384 KB Output is correct
3 Correct 4 ms 384 KB Output is correct
4 Correct 4 ms 384 KB Output is correct
5 Correct 5 ms 384 KB Output is correct
6 Correct 5 ms 384 KB Output is correct
7 Correct 5 ms 384 KB Output is correct
8 Correct 4 ms 384 KB Output is correct
9 Correct 5 ms 384 KB Output is correct
10 Correct 5 ms 384 KB Output is correct
11 Correct 4 ms 384 KB Output is correct
12 Correct 5 ms 384 KB Output is correct
13 Correct 4 ms 384 KB Output is correct
14 Correct 5 ms 384 KB Output is correct
15 Correct 4 ms 384 KB Output is correct
16 Correct 5 ms 384 KB Output is correct
17 Correct 5 ms 384 KB Output is correct
18 Correct 5 ms 384 KB Output is correct
19 Correct 5 ms 384 KB Output is correct
20 Correct 5 ms 384 KB Output is correct
21 Correct 5 ms 384 KB Output is correct
22 Correct 5 ms 384 KB Output is correct
23 Correct 5 ms 384 KB Output is correct
24 Correct 5 ms 384 KB Output is correct
25 Correct 5 ms 384 KB Output is correct
26 Correct 5 ms 384 KB Output is correct
27 Correct 5 ms 384 KB Output is correct
28 Correct 5 ms 384 KB Output is correct
29 Correct 5 ms 384 KB Output is correct
30 Correct 5 ms 384 KB Output is correct
31 Correct 6 ms 640 KB Output is correct
32 Correct 7 ms 768 KB Output is correct
33 Correct 7 ms 640 KB Output is correct
34 Correct 7 ms 768 KB Output is correct
35 Correct 6 ms 640 KB Output is correct
36 Correct 7 ms 640 KB Output is correct
37 Correct 6 ms 640 KB Output is correct
38 Correct 6 ms 640 KB Output is correct
39 Correct 7 ms 640 KB Output is correct
40 Correct 7 ms 640 KB Output is correct
41 Correct 6 ms 640 KB Output is correct
42 Correct 6 ms 640 KB Output is correct
43 Correct 6 ms 640 KB Output is correct
44 Correct 7 ms 640 KB Output is correct
45 Correct 6 ms 768 KB Output is correct
46 Correct 71 ms 11772 KB Output is correct
47 Correct 120 ms 11768 KB Output is correct
48 Correct 94 ms 11768 KB Output is correct
49 Correct 89 ms 11768 KB Output is correct
50 Correct 61 ms 11768 KB Output is correct
51 Correct 100 ms 11768 KB Output is correct
52 Correct 58 ms 6264 KB Output is correct
53 Correct 34 ms 3968 KB Output is correct
54 Correct 90 ms 11512 KB Output is correct
55 Correct 101 ms 11928 KB Output is correct
56 Correct 61 ms 11768 KB Output is correct
57 Correct 75 ms 11768 KB Output is correct
58 Correct 82 ms 11820 KB Output is correct
59 Correct 62 ms 11768 KB Output is correct
60 Correct 83 ms 11896 KB Output is correct

Subtask #5
0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 4 ms 384 KB Output is correct
3 Correct 4 ms 384 KB Output is correct
4 Correct 4 ms 384 KB Output is correct
5 Correct 5 ms 384 KB Output is correct
6 Correct 5 ms 384 KB Output is correct
7 Correct 5 ms 384 KB Output is correct
8 Correct 4 ms 384 KB Output is correct
9 Correct 5 ms 384 KB Output is correct
10 Correct 5 ms 384 KB Output is correct
11 Correct 4 ms 384 KB Output is correct
12 Correct 5 ms 384 KB Output is correct
13 Correct 4 ms 384 KB Output is correct
14 Correct 5 ms 384 KB Output is correct
15 Correct 4 ms 384 KB Output is correct
16 Correct 5 ms 384 KB Output is correct
17 Correct 5 ms 384 KB Output is correct
18 Correct 5 ms 384 KB Output is correct
19 Correct 5 ms 384 KB Output is correct
20 Correct 5 ms 384 KB Output is correct
21 Correct 5 ms 384 KB Output is correct
22 Correct 5 ms 384 KB Output is correct
23 Correct 5 ms 384 KB Output is correct
24 Correct 5 ms 384 KB Output is correct
25 Correct 5 ms 384 KB Output is correct
26 Correct 5 ms 384 KB Output is correct
27 Correct 5 ms 384 KB Output is correct
28 Correct 5 ms 384 KB Output is correct
29 Correct 5 ms 384 KB Output is correct
30 Correct 5 ms 384 KB Output is correct
31 Correct 6 ms 640 KB Output is correct
32 Correct 7 ms 768 KB Output is correct
33 Correct 7 ms 640 KB Output is correct
34 Correct 7 ms 768 KB Output is correct
35 Correct 6 ms 640 KB Output is correct
36 Correct 7 ms 640 KB Output is correct
37 Correct 6 ms 640 KB Output is correct
38 Correct 6 ms 640 KB Output is correct
39 Correct 7 ms 640 KB Output is correct
40 Correct 7 ms 640 KB Output is correct
41 Correct 6 ms 640 KB Output is correct
42 Correct 6 ms 640 KB Output is correct
43 Correct 6 ms 640 KB Output is correct
44 Correct 7 ms 640 KB Output is correct
45 Correct 6 ms 768 KB Output is correct
46 Correct 71 ms 11772 KB Output is correct
47 Correct 120 ms 11768 KB Output is correct
48 Correct 94 ms 11768 KB Output is correct
49 Correct 89 ms 11768 KB Output is correct
50 Correct 61 ms 11768 KB Output is correct
51 Correct 100 ms 11768 KB Output is correct
52 Correct 58 ms 6264 KB Output is correct
53 Correct 34 ms 3968 KB Output is correct
54 Correct 90 ms 11512 KB Output is correct
55 Correct 101 ms 11928 KB Output is correct
56 Correct 61 ms 11768 KB Output is correct
57 Correct 75 ms 11768 KB Output is correct
58 Correct 82 ms 11820 KB Output is correct
59 Correct 62 ms 11768 KB Output is correct
60 Correct 83 ms 11896 KB Output is correct
61 Correct 371 ms 55700 KB Output is correct
62 Correct 446 ms 55672 KB Output is correct
63 Correct 623 ms 55640 KB Output is correct
64 Correct 531 ms 56184 KB Output is correct
65 Correct 323 ms 55672 KB Output is correct
66 Correct 554 ms 55820 KB Output is correct
67 Correct 429 ms 44920 KB Output is correct
68 Correct 208 ms 22904 KB Output is correct
69 Incorrect 509 ms 55672 KB Output isn't correct
70 Halted 0 ms 0 KB -