Submission #851037

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
851037	2023-09-18T09:24:35 Z	wakandaaa	Bigger segments (IZhO19_segments)	C++17	100 / 100	55 ms	16068 KB

segments

#include <bits/stdc++.h>

using namespace std;

#define file ""

#define mp make_pair
#define fi first
#define se second
#define all(x) x.begin(), x.end()

#define getbit(x, i) (((x) >> (i)) & 1)
#define bit(x) (1LL << (x))
#define popcount __builtin_popcountll

mt19937_64 rd(chrono::steady_clock::now().time_since_epoch().count());
int rand(int l, int r) {
    return l + rd() % (r - l + 1);
}

const int N = 1e6 + 5;
const int mod = (int)1e9 + 7; // 998244353;
const int lg = 25; // lg + 1
const int oo = 1e9;
const long long ooo = 1e18;

template<class X, class Y> bool mini(X &a, Y b) {
    return a > b ? (a = b, true) : false;
}
template<class X, class Y> bool maxi(X &a, Y b) {
    return a < b ? (a = b, true) : false;
}
void add(int &a, int b) {
    a += b;
    if (a >= mod) a -= mod;
    if (a < 0) a += mod;
}

int n;
long long a[N];
int f[N], pos[N];

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

    // freopen(file".inp", "r", stdin);
    // freopen(file".out", "w", stdout);

    cin >> n;
    for (int i = 1; i <= n; ++i) {
    	cin >> a[i];
    	a[i] += a[i - 1];
    }

    for (int i = 1; i <= n; ++i) {
    	pos[i] = max(pos[i - 1], pos[i]);
    	f[i] = f[pos[i]] + 1;
    	int l = i, r = n, nxt = 0;
    	while (l <= r) {
    		int mid = (l + r) / 2;
    		if (a[mid] - a[i] >= a[i] - a[pos[i]]) {
    			nxt = mid;
    			r = mid - 1;
    		} else l = mid + 1;
    	}
    	pos[nxt] = i;
    }

    cout << f[n];

    return 0;
}

/*
s[i] - s[j] >= s[j] - s[k] -> binary search
*/

Subtask #1
13.0 / 13.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	2392 KB	Output is correct
2	Correct	1 ms	2392 KB	Output is correct
3	Correct	1 ms	2648 KB	Output is correct
4	Correct	1 ms	2392 KB	Output is correct
5	Correct	1 ms	2392 KB	Output is correct
6	Correct	1 ms	2396 KB	Output is correct
7	Correct	1 ms	2392 KB	Output is correct
8	Correct	1 ms	2592 KB	Output is correct
9	Correct	1 ms	2392 KB	Output is correct
10	Correct	1 ms	2392 KB	Output is correct
11	Correct	1 ms	2396 KB	Output is correct
12	Correct	1 ms	2396 KB	Output is correct
13	Correct	1 ms	2392 KB	Output is correct
14	Correct	1 ms	2396 KB	Output is correct
15	Correct	0 ms	2392 KB	Output is correct

Subtask #2
14.0 / 14.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	2392 KB	Output is correct
2	Correct	1 ms	2392 KB	Output is correct
3	Correct	1 ms	2648 KB	Output is correct
4	Correct	1 ms	2392 KB	Output is correct
5	Correct	1 ms	2392 KB	Output is correct
6	Correct	1 ms	2396 KB	Output is correct
7	Correct	1 ms	2392 KB	Output is correct
8	Correct	1 ms	2592 KB	Output is correct
9	Correct	1 ms	2392 KB	Output is correct
10	Correct	1 ms	2392 KB	Output is correct
11	Correct	1 ms	2396 KB	Output is correct
12	Correct	1 ms	2396 KB	Output is correct
13	Correct	1 ms	2392 KB	Output is correct
14	Correct	1 ms	2396 KB	Output is correct
15	Correct	0 ms	2392 KB	Output is correct
16	Correct	1 ms	2392 KB	Output is correct
17	Correct	1 ms	2392 KB	Output is correct
18	Correct	1 ms	2392 KB	Output is correct
19	Correct	1 ms	2396 KB	Output is correct
20	Correct	1 ms	2392 KB	Output is correct
21	Correct	1 ms	2396 KB	Output is correct
22	Correct	1 ms	2392 KB	Output is correct
23	Correct	1 ms	2392 KB	Output is correct
24	Correct	1 ms	2392 KB	Output is correct
25	Correct	1 ms	2396 KB	Output is correct
26	Correct	1 ms	2392 KB	Output is correct
27	Correct	1 ms	2396 KB	Output is correct
28	Correct	1 ms	2648 KB	Output is correct
29	Correct	1 ms	2392 KB	Output is correct
30	Correct	1 ms	2392 KB	Output is correct

Subtask #3
10.0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	2392 KB	Output is correct
2	Correct	1 ms	2392 KB	Output is correct
3	Correct	1 ms	2648 KB	Output is correct
4	Correct	1 ms	2392 KB	Output is correct
5	Correct	1 ms	2392 KB	Output is correct
6	Correct	1 ms	2396 KB	Output is correct
7	Correct	1 ms	2392 KB	Output is correct
8	Correct	1 ms	2592 KB	Output is correct
9	Correct	1 ms	2392 KB	Output is correct
10	Correct	1 ms	2392 KB	Output is correct
11	Correct	1 ms	2396 KB	Output is correct
12	Correct	1 ms	2396 KB	Output is correct
13	Correct	1 ms	2392 KB	Output is correct
14	Correct	1 ms	2396 KB	Output is correct
15	Correct	0 ms	2392 KB	Output is correct
16	Correct	1 ms	2392 KB	Output is correct
17	Correct	1 ms	2392 KB	Output is correct
18	Correct	1 ms	2392 KB	Output is correct
19	Correct	1 ms	2396 KB	Output is correct
20	Correct	1 ms	2392 KB	Output is correct
21	Correct	1 ms	2396 KB	Output is correct
22	Correct	1 ms	2392 KB	Output is correct
23	Correct	1 ms	2392 KB	Output is correct
24	Correct	1 ms	2392 KB	Output is correct
25	Correct	1 ms	2396 KB	Output is correct
26	Correct	1 ms	2392 KB	Output is correct
27	Correct	1 ms	2396 KB	Output is correct
28	Correct	1 ms	2648 KB	Output is correct
29	Correct	1 ms	2392 KB	Output is correct
30	Correct	1 ms	2392 KB	Output is correct
31	Correct	1 ms	2392 KB	Output is correct
32	Correct	2 ms	2392 KB	Output is correct
33	Correct	1 ms	2392 KB	Output is correct
34	Correct	1 ms	2396 KB	Output is correct
35	Correct	1 ms	2396 KB	Output is correct
36	Correct	1 ms	2392 KB	Output is correct
37	Correct	1 ms	2648 KB	Output is correct
38	Correct	1 ms	2396 KB	Output is correct
39	Correct	1 ms	2392 KB	Output is correct
40	Correct	1 ms	2392 KB	Output is correct
41	Correct	1 ms	2396 KB	Output is correct
42	Correct	1 ms	2392 KB	Output is correct
43	Correct	1 ms	2392 KB	Output is correct
44	Correct	1 ms	2904 KB	Output is correct
45	Correct	1 ms	2396 KB	Output is correct

Subtask #4
36.0 / 36.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	2392 KB	Output is correct
2	Correct	1 ms	2392 KB	Output is correct
3	Correct	1 ms	2648 KB	Output is correct
4	Correct	1 ms	2392 KB	Output is correct
5	Correct	1 ms	2392 KB	Output is correct
6	Correct	1 ms	2396 KB	Output is correct
7	Correct	1 ms	2392 KB	Output is correct
8	Correct	1 ms	2592 KB	Output is correct
9	Correct	1 ms	2392 KB	Output is correct
10	Correct	1 ms	2392 KB	Output is correct
11	Correct	1 ms	2396 KB	Output is correct
12	Correct	1 ms	2396 KB	Output is correct
13	Correct	1 ms	2392 KB	Output is correct
14	Correct	1 ms	2396 KB	Output is correct
15	Correct	0 ms	2392 KB	Output is correct
16	Correct	1 ms	2392 KB	Output is correct
17	Correct	1 ms	2392 KB	Output is correct
18	Correct	1 ms	2392 KB	Output is correct
19	Correct	1 ms	2396 KB	Output is correct
20	Correct	1 ms	2392 KB	Output is correct
21	Correct	1 ms	2396 KB	Output is correct
22	Correct	1 ms	2392 KB	Output is correct
23	Correct	1 ms	2392 KB	Output is correct
24	Correct	1 ms	2392 KB	Output is correct
25	Correct	1 ms	2396 KB	Output is correct
26	Correct	1 ms	2392 KB	Output is correct
27	Correct	1 ms	2396 KB	Output is correct
28	Correct	1 ms	2648 KB	Output is correct
29	Correct	1 ms	2392 KB	Output is correct
30	Correct	1 ms	2392 KB	Output is correct
31	Correct	1 ms	2392 KB	Output is correct
32	Correct	2 ms	2392 KB	Output is correct
33	Correct	1 ms	2392 KB	Output is correct
34	Correct	1 ms	2396 KB	Output is correct
35	Correct	1 ms	2396 KB	Output is correct
36	Correct	1 ms	2392 KB	Output is correct
37	Correct	1 ms	2648 KB	Output is correct
38	Correct	1 ms	2396 KB	Output is correct
39	Correct	1 ms	2392 KB	Output is correct
40	Correct	1 ms	2392 KB	Output is correct
41	Correct	1 ms	2396 KB	Output is correct
42	Correct	1 ms	2392 KB	Output is correct
43	Correct	1 ms	2392 KB	Output is correct
44	Correct	1 ms	2904 KB	Output is correct
45	Correct	1 ms	2396 KB	Output is correct
46	Correct	8 ms	7768 KB	Output is correct
47	Correct	11 ms	9560 KB	Output is correct
48	Correct	11 ms	10064 KB	Output is correct
49	Correct	10 ms	10072 KB	Output is correct
50	Correct	10 ms	10072 KB	Output is correct
51	Correct	12 ms	10072 KB	Output is correct
52	Correct	6 ms	5208 KB	Output is correct
53	Correct	4 ms	2904 KB	Output is correct
54	Correct	11 ms	9304 KB	Output is correct
55	Correct	13 ms	10072 KB	Output is correct
56	Correct	8 ms	9560 KB	Output is correct
57	Correct	9 ms	9560 KB	Output is correct
58	Correct	9 ms	9560 KB	Output is correct
59	Correct	9 ms	9564 KB	Output is correct
60	Correct	9 ms	9560 KB	Output is correct

Subtask #5
27.0 / 27.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	2392 KB	Output is correct
2	Correct	1 ms	2392 KB	Output is correct
3	Correct	1 ms	2648 KB	Output is correct
4	Correct	1 ms	2392 KB	Output is correct
5	Correct	1 ms	2392 KB	Output is correct
6	Correct	1 ms	2396 KB	Output is correct
7	Correct	1 ms	2392 KB	Output is correct
8	Correct	1 ms	2592 KB	Output is correct
9	Correct	1 ms	2392 KB	Output is correct
10	Correct	1 ms	2392 KB	Output is correct
11	Correct	1 ms	2396 KB	Output is correct
12	Correct	1 ms	2396 KB	Output is correct
13	Correct	1 ms	2392 KB	Output is correct
14	Correct	1 ms	2396 KB	Output is correct
15	Correct	0 ms	2392 KB	Output is correct
16	Correct	1 ms	2392 KB	Output is correct
17	Correct	1 ms	2392 KB	Output is correct
18	Correct	1 ms	2392 KB	Output is correct
19	Correct	1 ms	2396 KB	Output is correct
20	Correct	1 ms	2392 KB	Output is correct
21	Correct	1 ms	2396 KB	Output is correct
22	Correct	1 ms	2392 KB	Output is correct
23	Correct	1 ms	2392 KB	Output is correct
24	Correct	1 ms	2392 KB	Output is correct
25	Correct	1 ms	2396 KB	Output is correct
26	Correct	1 ms	2392 KB	Output is correct
27	Correct	1 ms	2396 KB	Output is correct
28	Correct	1 ms	2648 KB	Output is correct
29	Correct	1 ms	2392 KB	Output is correct
30	Correct	1 ms	2392 KB	Output is correct
31	Correct	1 ms	2392 KB	Output is correct
32	Correct	2 ms	2392 KB	Output is correct
33	Correct	1 ms	2392 KB	Output is correct
34	Correct	1 ms	2396 KB	Output is correct
35	Correct	1 ms	2396 KB	Output is correct
36	Correct	1 ms	2392 KB	Output is correct
37	Correct	1 ms	2648 KB	Output is correct
38	Correct	1 ms	2396 KB	Output is correct
39	Correct	1 ms	2392 KB	Output is correct
40	Correct	1 ms	2392 KB	Output is correct
41	Correct	1 ms	2396 KB	Output is correct
42	Correct	1 ms	2392 KB	Output is correct
43	Correct	1 ms	2392 KB	Output is correct
44	Correct	1 ms	2904 KB	Output is correct
45	Correct	1 ms	2396 KB	Output is correct
46	Correct	8 ms	7768 KB	Output is correct
47	Correct	11 ms	9560 KB	Output is correct
48	Correct	11 ms	10064 KB	Output is correct
49	Correct	10 ms	10072 KB	Output is correct
50	Correct	10 ms	10072 KB	Output is correct
51	Correct	12 ms	10072 KB	Output is correct
52	Correct	6 ms	5208 KB	Output is correct
53	Correct	4 ms	2904 KB	Output is correct
54	Correct	11 ms	9304 KB	Output is correct
55	Correct	13 ms	10072 KB	Output is correct
56	Correct	8 ms	9560 KB	Output is correct
57	Correct	9 ms	9560 KB	Output is correct
58	Correct	9 ms	9560 KB	Output is correct
59	Correct	9 ms	9564 KB	Output is correct
60	Correct	9 ms	9560 KB	Output is correct
61	Correct	36 ms	12880 KB	Output is correct
62	Correct	43 ms	13136 KB	Output is correct
63	Correct	47 ms	13392 KB	Output is correct
64	Correct	49 ms	15696 KB	Output is correct
65	Correct	52 ms	16068 KB	Output is correct
66	Correct	55 ms	16068 KB	Output is correct
67	Correct	54 ms	14928 KB	Output is correct
68	Correct	22 ms	11092 KB	Output is correct
69	Correct	37 ms	12116 KB	Output is correct
70	Correct	50 ms	15952 KB	Output is correct
71	Correct	34 ms	13136 KB	Output is correct
72	Correct	49 ms	13396 KB	Output is correct
73	Correct	44 ms	14160 KB	Output is correct
74	Correct	41 ms	14416 KB	Output is correct
75	Correct	42 ms	14528 KB	Output is correct

Submission #851037

Compilation message

Subtask #1 13.0 / 13.0

Subtask #2 14.0 / 14.0

Subtask #3 10.0 / 10.0

Subtask #4 36.0 / 36.0

Subtask #5 27.0 / 27.0

Subtask #1
13.0 / 13.0

Subtask #2
14.0 / 14.0

Subtask #3
10.0 / 10.0

Subtask #4
36.0 / 36.0

Subtask #5
27.0 / 27.0