Submission #331545

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
331545	2020-11-28T21:14:26 Z	limabeans	Bigger segments (IZhO19_segments)	C++17	73 / 100	45 ms	6252 KB

segments

#include <bits/stdc++.h>
using namespace std;

template<typename T>
void out(T x) { cout << x << endl; exit(0); }
#define watch(x) cout << (#x) << " is " << (x) << endl





using ll = long long;
const ll inf = 1e18;


const int maxn = 5e5;



int n;
ll a[maxn];
ll pre[maxn];
ll dp[maxn];
int pos[maxn];

ll qry(int l, int r) {
    assert(l<=r);
    return pre[r]-pre[l-1];
}

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

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

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

    for (int i=1; i<=n; i++) {
	pos[i]=max(pos[i],pos[i-1]);
	dp[i]=1+dp[pos[i]];

	int lo=i;
	int hi=n+1;
	int p=-1;
	while (hi-lo>1) {
	    int mid=(lo+hi)/2;
	    if (qry(pos[i]+1,i)<=qry(i+1,mid)) {
		hi=mid;
		p=mid;
	    } else {
		lo=mid;
	    }
	}
	if (~p) {
	    pos[p]=i;
	}
    }

    cout<<dp[n]<<endl;  
    return 0;
}

Subtask #1
13.0 / 13.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	364 KB	Output is correct
2	Correct	1 ms	384 KB	Output is correct
3	Correct	1 ms	364 KB	Output is correct
4	Correct	1 ms	376 KB	Output is correct
5	Correct	1 ms	384 KB	Output is correct
6	Correct	1 ms	364 KB	Output is correct
7	Correct	1 ms	364 KB	Output is correct
8	Correct	1 ms	364 KB	Output is correct
9	Correct	1 ms	364 KB	Output is correct
10	Correct	1 ms	364 KB	Output is correct
11	Correct	1 ms	364 KB	Output is correct
12	Correct	1 ms	364 KB	Output is correct
13	Correct	1 ms	364 KB	Output is correct
14	Correct	1 ms	384 KB	Output is correct
15	Correct	1 ms	364 KB	Output is correct

Subtask #2
14.0 / 14.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	364 KB	Output is correct
2	Correct	1 ms	384 KB	Output is correct
3	Correct	1 ms	364 KB	Output is correct
4	Correct	1 ms	376 KB	Output is correct
5	Correct	1 ms	384 KB	Output is correct
6	Correct	1 ms	364 KB	Output is correct
7	Correct	1 ms	364 KB	Output is correct
8	Correct	1 ms	364 KB	Output is correct
9	Correct	1 ms	364 KB	Output is correct
10	Correct	1 ms	364 KB	Output is correct
11	Correct	1 ms	364 KB	Output is correct
12	Correct	1 ms	364 KB	Output is correct
13	Correct	1 ms	364 KB	Output is correct
14	Correct	1 ms	384 KB	Output is correct
15	Correct	1 ms	364 KB	Output is correct
16	Correct	1 ms	364 KB	Output is correct
17	Correct	1 ms	364 KB	Output is correct
18	Correct	1 ms	364 KB	Output is correct
19	Correct	1 ms	364 KB	Output is correct
20	Correct	1 ms	364 KB	Output is correct
21	Correct	1 ms	364 KB	Output is correct
22	Correct	1 ms	364 KB	Output is correct
23	Correct	1 ms	364 KB	Output is correct
24	Correct	1 ms	364 KB	Output is correct
25	Correct	1 ms	364 KB	Output is correct
26	Correct	1 ms	364 KB	Output is correct
27	Correct	1 ms	364 KB	Output is correct
28	Correct	1 ms	364 KB	Output is correct
29	Correct	1 ms	364 KB	Output is correct
30	Correct	1 ms	364 KB	Output is correct

Subtask #3
10.0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	364 KB	Output is correct
2	Correct	1 ms	384 KB	Output is correct
3	Correct	1 ms	364 KB	Output is correct
4	Correct	1 ms	376 KB	Output is correct
5	Correct	1 ms	384 KB	Output is correct
6	Correct	1 ms	364 KB	Output is correct
7	Correct	1 ms	364 KB	Output is correct
8	Correct	1 ms	364 KB	Output is correct
9	Correct	1 ms	364 KB	Output is correct
10	Correct	1 ms	364 KB	Output is correct
11	Correct	1 ms	364 KB	Output is correct
12	Correct	1 ms	364 KB	Output is correct
13	Correct	1 ms	364 KB	Output is correct
14	Correct	1 ms	384 KB	Output is correct
15	Correct	1 ms	364 KB	Output is correct
16	Correct	1 ms	364 KB	Output is correct
17	Correct	1 ms	364 KB	Output is correct
18	Correct	1 ms	364 KB	Output is correct
19	Correct	1 ms	364 KB	Output is correct
20	Correct	1 ms	364 KB	Output is correct
21	Correct	1 ms	364 KB	Output is correct
22	Correct	1 ms	364 KB	Output is correct
23	Correct	1 ms	364 KB	Output is correct
24	Correct	1 ms	364 KB	Output is correct
25	Correct	1 ms	364 KB	Output is correct
26	Correct	1 ms	364 KB	Output is correct
27	Correct	1 ms	364 KB	Output is correct
28	Correct	1 ms	364 KB	Output is correct
29	Correct	1 ms	364 KB	Output is correct
30	Correct	1 ms	364 KB	Output is correct
31	Correct	1 ms	492 KB	Output is correct
32	Correct	1 ms	492 KB	Output is correct
33	Correct	1 ms	492 KB	Output is correct
34	Correct	1 ms	492 KB	Output is correct
35	Correct	2 ms	620 KB	Output is correct
36	Correct	1 ms	564 KB	Output is correct
37	Correct	1 ms	492 KB	Output is correct
38	Correct	1 ms	492 KB	Output is correct
39	Correct	1 ms	492 KB	Output is correct
40	Correct	1 ms	492 KB	Output is correct
41	Correct	1 ms	492 KB	Output is correct
42	Correct	1 ms	492 KB	Output is correct
43	Correct	1 ms	492 KB	Output is correct
44	Correct	1 ms	492 KB	Output is correct
45	Correct	1 ms	492 KB	Output is correct

Subtask #4
36.0 / 36.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	364 KB	Output is correct
2	Correct	1 ms	384 KB	Output is correct
3	Correct	1 ms	364 KB	Output is correct
4	Correct	1 ms	376 KB	Output is correct
5	Correct	1 ms	384 KB	Output is correct
6	Correct	1 ms	364 KB	Output is correct
7	Correct	1 ms	364 KB	Output is correct
8	Correct	1 ms	364 KB	Output is correct
9	Correct	1 ms	364 KB	Output is correct
10	Correct	1 ms	364 KB	Output is correct
11	Correct	1 ms	364 KB	Output is correct
12	Correct	1 ms	364 KB	Output is correct
13	Correct	1 ms	364 KB	Output is correct
14	Correct	1 ms	384 KB	Output is correct
15	Correct	1 ms	364 KB	Output is correct
16	Correct	1 ms	364 KB	Output is correct
17	Correct	1 ms	364 KB	Output is correct
18	Correct	1 ms	364 KB	Output is correct
19	Correct	1 ms	364 KB	Output is correct
20	Correct	1 ms	364 KB	Output is correct
21	Correct	1 ms	364 KB	Output is correct
22	Correct	1 ms	364 KB	Output is correct
23	Correct	1 ms	364 KB	Output is correct
24	Correct	1 ms	364 KB	Output is correct
25	Correct	1 ms	364 KB	Output is correct
26	Correct	1 ms	364 KB	Output is correct
27	Correct	1 ms	364 KB	Output is correct
28	Correct	1 ms	364 KB	Output is correct
29	Correct	1 ms	364 KB	Output is correct
30	Correct	1 ms	364 KB	Output is correct
31	Correct	1 ms	492 KB	Output is correct
32	Correct	1 ms	492 KB	Output is correct
33	Correct	1 ms	492 KB	Output is correct
34	Correct	1 ms	492 KB	Output is correct
35	Correct	2 ms	620 KB	Output is correct
36	Correct	1 ms	564 KB	Output is correct
37	Correct	1 ms	492 KB	Output is correct
38	Correct	1 ms	492 KB	Output is correct
39	Correct	1 ms	492 KB	Output is correct
40	Correct	1 ms	492 KB	Output is correct
41	Correct	1 ms	492 KB	Output is correct
42	Correct	1 ms	492 KB	Output is correct
43	Correct	1 ms	492 KB	Output is correct
44	Correct	1 ms	492 KB	Output is correct
45	Correct	1 ms	492 KB	Output is correct
46	Correct	13 ms	3564 KB	Output is correct
47	Correct	16 ms	3712 KB	Output is correct
48	Correct	17 ms	3948 KB	Output is correct
49	Correct	16 ms	4076 KB	Output is correct
50	Correct	17 ms	4096 KB	Output is correct
51	Correct	18 ms	4076 KB	Output is correct
52	Correct	9 ms	2156 KB	Output is correct
53	Correct	7 ms	1536 KB	Output is correct
54	Correct	13 ms	3308 KB	Output is correct
55	Correct	17 ms	4076 KB	Output is correct
56	Correct	13 ms	3564 KB	Output is correct
57	Correct	14 ms	3564 KB	Output is correct
58	Correct	14 ms	3564 KB	Output is correct
59	Correct	14 ms	3692 KB	Output is correct
60	Correct	14 ms	3692 KB	Output is correct

Subtask #5
0 / 27.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	364 KB	Output is correct
2	Correct	1 ms	384 KB	Output is correct
3	Correct	1 ms	364 KB	Output is correct
4	Correct	1 ms	376 KB	Output is correct
5	Correct	1 ms	384 KB	Output is correct
6	Correct	1 ms	364 KB	Output is correct
7	Correct	1 ms	364 KB	Output is correct
8	Correct	1 ms	364 KB	Output is correct
9	Correct	1 ms	364 KB	Output is correct
10	Correct	1 ms	364 KB	Output is correct
11	Correct	1 ms	364 KB	Output is correct
12	Correct	1 ms	364 KB	Output is correct
13	Correct	1 ms	364 KB	Output is correct
14	Correct	1 ms	384 KB	Output is correct
15	Correct	1 ms	364 KB	Output is correct
16	Correct	1 ms	364 KB	Output is correct
17	Correct	1 ms	364 KB	Output is correct
18	Correct	1 ms	364 KB	Output is correct
19	Correct	1 ms	364 KB	Output is correct
20	Correct	1 ms	364 KB	Output is correct
21	Correct	1 ms	364 KB	Output is correct
22	Correct	1 ms	364 KB	Output is correct
23	Correct	1 ms	364 KB	Output is correct
24	Correct	1 ms	364 KB	Output is correct
25	Correct	1 ms	364 KB	Output is correct
26	Correct	1 ms	364 KB	Output is correct
27	Correct	1 ms	364 KB	Output is correct
28	Correct	1 ms	364 KB	Output is correct
29	Correct	1 ms	364 KB	Output is correct
30	Correct	1 ms	364 KB	Output is correct
31	Correct	1 ms	492 KB	Output is correct
32	Correct	1 ms	492 KB	Output is correct
33	Correct	1 ms	492 KB	Output is correct
34	Correct	1 ms	492 KB	Output is correct
35	Correct	2 ms	620 KB	Output is correct
36	Correct	1 ms	564 KB	Output is correct
37	Correct	1 ms	492 KB	Output is correct
38	Correct	1 ms	492 KB	Output is correct
39	Correct	1 ms	492 KB	Output is correct
40	Correct	1 ms	492 KB	Output is correct
41	Correct	1 ms	492 KB	Output is correct
42	Correct	1 ms	492 KB	Output is correct
43	Correct	1 ms	492 KB	Output is correct
44	Correct	1 ms	492 KB	Output is correct
45	Correct	1 ms	492 KB	Output is correct
46	Correct	13 ms	3564 KB	Output is correct
47	Correct	16 ms	3712 KB	Output is correct
48	Correct	17 ms	3948 KB	Output is correct
49	Correct	16 ms	4076 KB	Output is correct
50	Correct	17 ms	4096 KB	Output is correct
51	Correct	18 ms	4076 KB	Output is correct
52	Correct	9 ms	2156 KB	Output is correct
53	Correct	7 ms	1536 KB	Output is correct
54	Correct	13 ms	3308 KB	Output is correct
55	Correct	17 ms	4076 KB	Output is correct
56	Correct	13 ms	3564 KB	Output is correct
57	Correct	14 ms	3564 KB	Output is correct
58	Correct	14 ms	3564 KB	Output is correct
59	Correct	14 ms	3692 KB	Output is correct
60	Correct	14 ms	3692 KB	Output is correct
61	Correct	45 ms	6252 KB	Output is correct
62	Incorrect	38 ms	6252 KB	Output isn't correct
63	Halted	0 ms	0 KB	-

Submission #331545

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 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
0 / 27.0