Submission #863509

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
863509	2023-10-20T13:25:26 Z	letterc67	Bigger segments (IZhO19_segments)	C++14	100 / 100	113 ms	36448 KB

segments

#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define fi first
#define sc second
#define pll pair<ll,ll>
#define pii pair<int,int>
#define all(x) (x).begin(),(x).end()
const ll nmax = 5e5+6;
const ll inf = 1e18;
ll a[nmax];
ll pref[nmax];
ll n;
struct segtre{
	ll st[nmax * 4];
	void init(int n){
		for(int i = 1;i<=4*n;i++) st[i] = inf;
	}
	void update(int id,int l,int r,int i,ll x){
		if(i>r ||i <l) return;
		if(l==r) {
			st[id] = x;
			return;
		}
		int mid = (l+r)/2;
		update(id*2,l,mid,i,x);
		update(id*2+1,mid+1,r,i,x);
		st[id] = min(st[id*2],st[id*2+1]);
	}
	ll walk(int id,int l,int r,ll x){
		if (l==r) return l ;
		int mid = (l+r)/2;
		if(st[id*2] <= x) return walk(id*2,l,mid,x);
		return walk(id*2+1,mid+1,r,x);
	}
} tree;
ll dp[nmax];
ll f[nmax];
void solve(){
    cin >> n;
    for(int i = 1;i<=n;i++){
    	cin >> a[i];
    	// pref[i] = pref[i-1] + a[i];
    }
  reverse(a + 1, a + n + 1);
    tree.init(n+1);
    tree.update(1,1,n+1,n+1,0);
    for(int i = n;i>=1;i--){
    	pref[i] = pref[i+1] + a[i];
    	int get = tree.walk(1,1,n+1,pref[i]);
    	// cout << get << '\n';
    	f[i] = pref[i] - pref[get];
    	dp[i] = dp[get] + 1;
    	tree.update(1,1,n+1,i,f[i] + pref[i]);
    }
    // cout << f[2];
    cout << dp[1];
}

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

Subtask #1
13.0 / 13.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	6492 KB	Output is correct
2	Correct	1 ms	6492 KB	Output is correct
3	Correct	1 ms	6492 KB	Output is correct
4	Correct	1 ms	6492 KB	Output is correct
5	Correct	1 ms	6492 KB	Output is correct
6	Correct	1 ms	6492 KB	Output is correct
7	Correct	1 ms	6560 KB	Output is correct
8	Correct	1 ms	6488 KB	Output is correct
9	Correct	1 ms	6488 KB	Output is correct
10	Correct	1 ms	6492 KB	Output is correct
11	Correct	1 ms	6492 KB	Output is correct
12	Correct	1 ms	6492 KB	Output is correct
13	Correct	1 ms	6492 KB	Output is correct
14	Correct	1 ms	6492 KB	Output is correct
15	Correct	1 ms	6492 KB	Output is correct

Subtask #2
14.0 / 14.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	6492 KB	Output is correct
2	Correct	1 ms	6492 KB	Output is correct
3	Correct	1 ms	6492 KB	Output is correct
4	Correct	1 ms	6492 KB	Output is correct
5	Correct	1 ms	6492 KB	Output is correct
6	Correct	1 ms	6492 KB	Output is correct
7	Correct	1 ms	6560 KB	Output is correct
8	Correct	1 ms	6488 KB	Output is correct
9	Correct	1 ms	6488 KB	Output is correct
10	Correct	1 ms	6492 KB	Output is correct
11	Correct	1 ms	6492 KB	Output is correct
12	Correct	1 ms	6492 KB	Output is correct
13	Correct	1 ms	6492 KB	Output is correct
14	Correct	1 ms	6492 KB	Output is correct
15	Correct	1 ms	6492 KB	Output is correct
16	Correct	1 ms	6492 KB	Output is correct
17	Correct	1 ms	6492 KB	Output is correct
18	Correct	1 ms	6492 KB	Output is correct
19	Correct	1 ms	6492 KB	Output is correct
20	Correct	1 ms	6492 KB	Output is correct
21	Correct	1 ms	6488 KB	Output is correct
22	Correct	1 ms	6492 KB	Output is correct
23	Correct	1 ms	6492 KB	Output is correct
24	Correct	1 ms	6492 KB	Output is correct
25	Correct	1 ms	6492 KB	Output is correct
26	Correct	1 ms	6616 KB	Output is correct
27	Correct	1 ms	6492 KB	Output is correct
28	Correct	1 ms	6492 KB	Output is correct
29	Correct	1 ms	6492 KB	Output is correct
30	Correct	1 ms	6492 KB	Output is correct

Subtask #3
10.0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	6492 KB	Output is correct
2	Correct	1 ms	6492 KB	Output is correct
3	Correct	1 ms	6492 KB	Output is correct
4	Correct	1 ms	6492 KB	Output is correct
5	Correct	1 ms	6492 KB	Output is correct
6	Correct	1 ms	6492 KB	Output is correct
7	Correct	1 ms	6560 KB	Output is correct
8	Correct	1 ms	6488 KB	Output is correct
9	Correct	1 ms	6488 KB	Output is correct
10	Correct	1 ms	6492 KB	Output is correct
11	Correct	1 ms	6492 KB	Output is correct
12	Correct	1 ms	6492 KB	Output is correct
13	Correct	1 ms	6492 KB	Output is correct
14	Correct	1 ms	6492 KB	Output is correct
15	Correct	1 ms	6492 KB	Output is correct
16	Correct	1 ms	6492 KB	Output is correct
17	Correct	1 ms	6492 KB	Output is correct
18	Correct	1 ms	6492 KB	Output is correct
19	Correct	1 ms	6492 KB	Output is correct
20	Correct	1 ms	6492 KB	Output is correct
21	Correct	1 ms	6488 KB	Output is correct
22	Correct	1 ms	6492 KB	Output is correct
23	Correct	1 ms	6492 KB	Output is correct
24	Correct	1 ms	6492 KB	Output is correct
25	Correct	1 ms	6492 KB	Output is correct
26	Correct	1 ms	6616 KB	Output is correct
27	Correct	1 ms	6492 KB	Output is correct
28	Correct	1 ms	6492 KB	Output is correct
29	Correct	1 ms	6492 KB	Output is correct
30	Correct	1 ms	6492 KB	Output is correct
31	Correct	1 ms	6492 KB	Output is correct
32	Correct	2 ms	6628 KB	Output is correct
33	Correct	2 ms	6492 KB	Output is correct
34	Correct	1 ms	6492 KB	Output is correct
35	Correct	2 ms	6488 KB	Output is correct
36	Correct	1 ms	6744 KB	Output is correct
37	Correct	1 ms	6492 KB	Output is correct
38	Correct	1 ms	6496 KB	Output is correct
39	Correct	1 ms	6496 KB	Output is correct
40	Correct	1 ms	6492 KB	Output is correct
41	Correct	1 ms	6496 KB	Output is correct
42	Correct	1 ms	6500 KB	Output is correct
43	Correct	2 ms	6628 KB	Output is correct
44	Correct	2 ms	6492 KB	Output is correct
45	Correct	1 ms	6496 KB	Output is correct

Subtask #4
36.0 / 36.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	6492 KB	Output is correct
2	Correct	1 ms	6492 KB	Output is correct
3	Correct	1 ms	6492 KB	Output is correct
4	Correct	1 ms	6492 KB	Output is correct
5	Correct	1 ms	6492 KB	Output is correct
6	Correct	1 ms	6492 KB	Output is correct
7	Correct	1 ms	6560 KB	Output is correct
8	Correct	1 ms	6488 KB	Output is correct
9	Correct	1 ms	6488 KB	Output is correct
10	Correct	1 ms	6492 KB	Output is correct
11	Correct	1 ms	6492 KB	Output is correct
12	Correct	1 ms	6492 KB	Output is correct
13	Correct	1 ms	6492 KB	Output is correct
14	Correct	1 ms	6492 KB	Output is correct
15	Correct	1 ms	6492 KB	Output is correct
16	Correct	1 ms	6492 KB	Output is correct
17	Correct	1 ms	6492 KB	Output is correct
18	Correct	1 ms	6492 KB	Output is correct
19	Correct	1 ms	6492 KB	Output is correct
20	Correct	1 ms	6492 KB	Output is correct
21	Correct	1 ms	6488 KB	Output is correct
22	Correct	1 ms	6492 KB	Output is correct
23	Correct	1 ms	6492 KB	Output is correct
24	Correct	1 ms	6492 KB	Output is correct
25	Correct	1 ms	6492 KB	Output is correct
26	Correct	1 ms	6616 KB	Output is correct
27	Correct	1 ms	6492 KB	Output is correct
28	Correct	1 ms	6492 KB	Output is correct
29	Correct	1 ms	6492 KB	Output is correct
30	Correct	1 ms	6492 KB	Output is correct
31	Correct	1 ms	6492 KB	Output is correct
32	Correct	2 ms	6628 KB	Output is correct
33	Correct	2 ms	6492 KB	Output is correct
34	Correct	1 ms	6492 KB	Output is correct
35	Correct	2 ms	6488 KB	Output is correct
36	Correct	1 ms	6744 KB	Output is correct
37	Correct	1 ms	6492 KB	Output is correct
38	Correct	1 ms	6496 KB	Output is correct
39	Correct	1 ms	6496 KB	Output is correct
40	Correct	1 ms	6492 KB	Output is correct
41	Correct	1 ms	6496 KB	Output is correct
42	Correct	1 ms	6500 KB	Output is correct
43	Correct	2 ms	6628 KB	Output is correct
44	Correct	2 ms	6492 KB	Output is correct
45	Correct	1 ms	6496 KB	Output is correct
46	Correct	18 ms	15712 KB	Output is correct
47	Correct	19 ms	15712 KB	Output is correct
48	Correct	20 ms	16032 KB	Output is correct
49	Correct	21 ms	16224 KB	Output is correct
50	Correct	22 ms	16224 KB	Output is correct
51	Correct	22 ms	16216 KB	Output is correct
52	Correct	11 ms	13404 KB	Output is correct
53	Correct	8 ms	11356 KB	Output is correct
54	Correct	19 ms	15536 KB	Output is correct
55	Correct	22 ms	16208 KB	Output is correct
56	Correct	20 ms	15704 KB	Output is correct
57	Correct	19 ms	15704 KB	Output is correct
58	Correct	19 ms	15708 KB	Output is correct
59	Correct	20 ms	15952 KB	Output is correct
60	Correct	20 ms	15960 KB	Output is correct

Subtask #5
27.0 / 27.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	6492 KB	Output is correct
2	Correct	1 ms	6492 KB	Output is correct
3	Correct	1 ms	6492 KB	Output is correct
4	Correct	1 ms	6492 KB	Output is correct
5	Correct	1 ms	6492 KB	Output is correct
6	Correct	1 ms	6492 KB	Output is correct
7	Correct	1 ms	6560 KB	Output is correct
8	Correct	1 ms	6488 KB	Output is correct
9	Correct	1 ms	6488 KB	Output is correct
10	Correct	1 ms	6492 KB	Output is correct
11	Correct	1 ms	6492 KB	Output is correct
12	Correct	1 ms	6492 KB	Output is correct
13	Correct	1 ms	6492 KB	Output is correct
14	Correct	1 ms	6492 KB	Output is correct
15	Correct	1 ms	6492 KB	Output is correct
16	Correct	1 ms	6492 KB	Output is correct
17	Correct	1 ms	6492 KB	Output is correct
18	Correct	1 ms	6492 KB	Output is correct
19	Correct	1 ms	6492 KB	Output is correct
20	Correct	1 ms	6492 KB	Output is correct
21	Correct	1 ms	6488 KB	Output is correct
22	Correct	1 ms	6492 KB	Output is correct
23	Correct	1 ms	6492 KB	Output is correct
24	Correct	1 ms	6492 KB	Output is correct
25	Correct	1 ms	6492 KB	Output is correct
26	Correct	1 ms	6616 KB	Output is correct
27	Correct	1 ms	6492 KB	Output is correct
28	Correct	1 ms	6492 KB	Output is correct
29	Correct	1 ms	6492 KB	Output is correct
30	Correct	1 ms	6492 KB	Output is correct
31	Correct	1 ms	6492 KB	Output is correct
32	Correct	2 ms	6628 KB	Output is correct
33	Correct	2 ms	6492 KB	Output is correct
34	Correct	1 ms	6492 KB	Output is correct
35	Correct	2 ms	6488 KB	Output is correct
36	Correct	1 ms	6744 KB	Output is correct
37	Correct	1 ms	6492 KB	Output is correct
38	Correct	1 ms	6496 KB	Output is correct
39	Correct	1 ms	6496 KB	Output is correct
40	Correct	1 ms	6492 KB	Output is correct
41	Correct	1 ms	6496 KB	Output is correct
42	Correct	1 ms	6500 KB	Output is correct
43	Correct	2 ms	6628 KB	Output is correct
44	Correct	2 ms	6492 KB	Output is correct
45	Correct	1 ms	6496 KB	Output is correct
46	Correct	18 ms	15712 KB	Output is correct
47	Correct	19 ms	15712 KB	Output is correct
48	Correct	20 ms	16032 KB	Output is correct
49	Correct	21 ms	16224 KB	Output is correct
50	Correct	22 ms	16224 KB	Output is correct
51	Correct	22 ms	16216 KB	Output is correct
52	Correct	11 ms	13404 KB	Output is correct
53	Correct	8 ms	11356 KB	Output is correct
54	Correct	19 ms	15536 KB	Output is correct
55	Correct	22 ms	16208 KB	Output is correct
56	Correct	20 ms	15704 KB	Output is correct
57	Correct	19 ms	15704 KB	Output is correct
58	Correct	19 ms	15708 KB	Output is correct
59	Correct	20 ms	15952 KB	Output is correct
60	Correct	20 ms	15960 KB	Output is correct
61	Correct	101 ms	33532 KB	Output is correct
62	Correct	94 ms	33496 KB	Output is correct
63	Correct	96 ms	33872 KB	Output is correct
64	Correct	108 ms	36104 KB	Output is correct
65	Correct	112 ms	36448 KB	Output is correct
66	Correct	108 ms	36432 KB	Output is correct
67	Correct	87 ms	32852 KB	Output is correct
68	Correct	45 ms	22356 KB	Output is correct
69	Correct	98 ms	32612 KB	Output is correct
70	Correct	111 ms	36432 KB	Output is correct
71	Correct	95 ms	33524 KB	Output is correct
72	Correct	94 ms	34000 KB	Output is correct
73	Correct	98 ms	34508 KB	Output is correct
74	Correct	113 ms	35008 KB	Output is correct
75	Correct	106 ms	34896 KB	Output is correct

Submission #863509

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