oj.uz

Submission #231476

# Submission time Handle Problem Language Result Execution time Memory
231476 2020-05-13T17:41:40 Z _fractal Bigger segments (IZhO19_segments) C++14
100 / 100
 588 ms 47608 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;
    pii mx, val;
    treap *l, *r;
    treap(ll new_x, ll new_mx, ll pos) {
        x = new_x;
        y = (rand() << 15) | rand();
        mx = {new_mx, pos};
        val = {new_mx, pos};
        l = r = nullptr;
    }
};
 
pii 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, pii 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, pii)':
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 4 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 5 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 5 ms 384 KB Output is correct
9 Correct 4 ms 384 KB Output is correct
10 Correct 5 ms 384 KB Output is correct
11 Correct 5 ms 384 KB Output is correct
12 Correct 5 ms 384 KB Output is correct
13 Correct 5 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 4 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 5 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 5 ms 384 KB Output is correct
9 Correct 4 ms 384 KB Output is correct
10 Correct 5 ms 384 KB Output is correct
11 Correct 5 ms 384 KB Output is correct
12 Correct 5 ms 384 KB Output is correct
13 Correct 5 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 512 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 4 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 5 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 5 ms 384 KB Output is correct
9 Correct 4 ms 384 KB Output is correct
10 Correct 5 ms 384 KB Output is correct
11 Correct 5 ms 384 KB Output is correct
12 Correct 5 ms 384 KB Output is correct
13 Correct 5 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 512 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 640 KB Output is correct
33 Correct 7 ms 640 KB Output is correct
34 Correct 7 ms 640 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 512 KB Output is correct
39 Correct 6 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 6 ms 640 KB Output is correct
45 Correct 6 ms 640 KB Output is correct

Subtask #4
36.0 / 36.0

# Verdict Execution time Memory Grader output
1 Correct 4 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 5 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 5 ms 384 KB Output is correct
9 Correct 4 ms 384 KB Output is correct
10 Correct 5 ms 384 KB Output is correct
11 Correct 5 ms 384 KB Output is correct
12 Correct 5 ms 384 KB Output is correct
13 Correct 5 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 512 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 640 KB Output is correct
33 Correct 7 ms 640 KB Output is correct
34 Correct 7 ms 640 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 512 KB Output is correct
39 Correct 6 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 6 ms 640 KB Output is correct
45 Correct 6 ms 640 KB Output is correct
46 Correct 76 ms 9796 KB Output is correct
47 Correct 116 ms 9720 KB Output is correct
48 Correct 98 ms 9828 KB Output is correct
49 Correct 89 ms 9720 KB Output is correct
50 Correct 65 ms 9720 KB Output is correct
51 Correct 107 ms 9720 KB Output is correct
52 Correct 53 ms 5112 KB Output is correct
53 Correct 31 ms 3192 KB Output is correct
54 Correct 99 ms 9720 KB Output is correct
55 Correct 102 ms 9720 KB Output is correct
56 Correct 62 ms 9720 KB Output is correct
57 Correct 68 ms 9720 KB Output is correct
58 Correct 77 ms 9720 KB Output is correct
59 Correct 60 ms 9724 KB Output is correct
60 Correct 79 ms 9720 KB Output is correct

Subtask #5
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 4 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 5 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 5 ms 384 KB Output is correct
9 Correct 4 ms 384 KB Output is correct
10 Correct 5 ms 384 KB Output is correct
11 Correct 5 ms 384 KB Output is correct
12 Correct 5 ms 384 KB Output is correct
13 Correct 5 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 512 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 640 KB Output is correct
33 Correct 7 ms 640 KB Output is correct
34 Correct 7 ms 640 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 512 KB Output is correct
39 Correct 6 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 6 ms 640 KB Output is correct
45 Correct 6 ms 640 KB Output is correct
46 Correct 76 ms 9796 KB Output is correct
47 Correct 116 ms 9720 KB Output is correct
48 Correct 98 ms 9828 KB Output is correct
49 Correct 89 ms 9720 KB Output is correct
50 Correct 65 ms 9720 KB Output is correct
51 Correct 107 ms 9720 KB Output is correct
52 Correct 53 ms 5112 KB Output is correct
53 Correct 31 ms 3192 KB Output is correct
54 Correct 99 ms 9720 KB Output is correct
55 Correct 102 ms 9720 KB Output is correct
56 Correct 62 ms 9720 KB Output is correct
57 Correct 68 ms 9720 KB Output is correct
58 Correct 77 ms 9720 KB Output is correct
59 Correct 60 ms 9724 KB Output is correct
60 Correct 79 ms 9720 KB Output is correct
61 Correct 399 ms 47352 KB Output is correct
62 Correct 466 ms 47352 KB Output is correct
63 Correct 588 ms 47448 KB Output is correct
64 Correct 485 ms 47352 KB Output is correct
65 Correct 340 ms 47356 KB Output is correct
66 Correct 544 ms 47356 KB Output is correct
67 Correct 405 ms 37880 KB Output is correct
68 Correct 217 ms 19200 KB Output is correct
69 Correct 495 ms 47352 KB Output is correct
70 Correct 525 ms 47480 KB Output is correct
71 Correct 308 ms 47480 KB Output is correct
72 Correct 389 ms 47608 KB Output is correct
73 Correct 375 ms 47480 KB Output is correct
74 Correct 318 ms 47488 KB Output is correct
75 Correct 351 ms 47480 KB Output is correct