Submission #172972

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
172972	2020-01-02T21:42:30 Z	LinusTorvaldsFan	Bigger segments (IZhO19_segments)	C++14	73 / 100	934 ms	262144 KB

segments

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;

struct Node{
	pair<int,int>val;
	ll l, r;
	Node*left;
	Node*right;
	Node(ll _l, ll _r) {
		val={0,0};
		l=_l;
		r=_r;
		left=nullptr;
		right=nullptr;
	}
};

pair<int,int>get_val(Node *root){
	if(root==nullptr)return make_pair(0,0);
	return root->val;
}

void update(Node *root, ll p, int x, int y) {
	//cout<<root->l<<" "<<root->r<<endl;
	if(root->l==p && root->r==p){
		root->val=max(make_pair(x,y),root->val);
		return;
	}
	ll m=(root->l+root->r)/2;
	if(root->l<=p&&p<=m){
		if(root->left==nullptr){
			root->left=new Node(root->l,m);
		}
		update(root->left,p,x,y);
	}
	else{
		if(root->right==nullptr){
			root->right=new Node(m+1,root->r);
		}
		update(root->right,p,x,y);
	}
	root->val=max(get_val(root->left),get_val(root->right));
}

pair<int,int> get(Node *root, ll l, ll r){
	if(l>root->r || root->l>r) {
		return {0,0};
	}
	if(l<=root->l && root->r<=r){
		return root->val;
	}
	pair<int,int> ans={0,0};
	if(root->right!=nullptr){
		ans=max(ans,get(root->right,l,r));
	}
	if(root->left!=nullptr){
		ans=max(ans,get(root->left,l,r));
	}
	return ans;
}

int main() {
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	int n;
	cin>>n;
	vector<int>a(n);
	for(int i=0;i<n;i++)cin>>a[i];
	
	vector<ll>pr(n+1);
	for(int i=0;i<n;i++)pr[i+1]=pr[i]+a[i];
	vector<int>ans(n);
	vector<ll> ans_sum(n);
	ll sum=0;
	for(int i=0;i<n;i++){
		sum+=a[i];
		ans_sum[i]=sum;
		ans[i]=1;
	}
	Node *tree=new Node(0,1e18);
	update(tree,ans_sum[0]+pr[1],ans[0],0);
	for(int i=1;i<n;i++){
		if(n<=100){
		for(int j=i-1;j>=0;j--){
			if(pr[i+1]>=ans_sum[j]+pr[j+1]){
				if(ans[i]<ans[j]+1){
					ans[i]=ans[j]+1;
					ans_sum[i]=pr[i+1]-pr[j+1];
				}
			}
		}
		//cout<<ans[i]<<" ";
		//cout<<ans_sum[i]<<" ";
		//cout<<endl;
		}
		else{
		auto t=get(tree,0,pr[i+1]);
		if(pr[i+1]>=ans_sum[t.second]+pr[t.second+1]){
			if(ans[i]<t.first+1){
				ans[i]=t.first+1;
				ans_sum[i]=pr[i+1]-pr[t.second+1];
			}	
		}
		update(tree,ans_sum[i]+pr[i+1],ans[i],i);
		}
		//cout<<ans[i]<<" ";
		//cout<<ans_sum[i]<<" ";
		//cout<<endl;
	}
	cout<<ans[n-1];
	return 0;
}

Subtask #1
13.0 / 13.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	380 KB	Output is correct
2	Correct	2 ms	376 KB	Output is correct
3	Correct	2 ms	380 KB	Output is correct
4	Correct	2 ms	376 KB	Output is correct
5	Correct	2 ms	380 KB	Output is correct
6	Correct	2 ms	376 KB	Output is correct
7	Correct	2 ms	376 KB	Output is correct
8	Correct	2 ms	376 KB	Output is correct
9	Correct	2 ms	376 KB	Output is correct
10	Correct	2 ms	376 KB	Output is correct
11	Correct	2 ms	376 KB	Output is correct
12	Correct	2 ms	376 KB	Output is correct
13	Correct	2 ms	376 KB	Output is correct
14	Correct	2 ms	376 KB	Output is correct
15	Correct	2 ms	376 KB	Output is correct

Subtask #2
14.0 / 14.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	380 KB	Output is correct
2	Correct	2 ms	376 KB	Output is correct
3	Correct	2 ms	380 KB	Output is correct
4	Correct	2 ms	376 KB	Output is correct
5	Correct	2 ms	380 KB	Output is correct
6	Correct	2 ms	376 KB	Output is correct
7	Correct	2 ms	376 KB	Output is correct
8	Correct	2 ms	376 KB	Output is correct
9	Correct	2 ms	376 KB	Output is correct
10	Correct	2 ms	376 KB	Output is correct
11	Correct	2 ms	376 KB	Output is correct
12	Correct	2 ms	376 KB	Output is correct
13	Correct	2 ms	376 KB	Output is correct
14	Correct	2 ms	376 KB	Output is correct
15	Correct	2 ms	376 KB	Output is correct
16	Correct	3 ms	760 KB	Output is correct
17	Correct	3 ms	888 KB	Output is correct
18	Correct	3 ms	1016 KB	Output is correct
19	Correct	3 ms	1016 KB	Output is correct
20	Correct	4 ms	1016 KB	Output is correct
21	Correct	3 ms	1016 KB	Output is correct
22	Correct	3 ms	888 KB	Output is correct
23	Correct	3 ms	764 KB	Output is correct
24	Correct	3 ms	504 KB	Output is correct
25	Correct	4 ms	1016 KB	Output is correct
26	Correct	3 ms	376 KB	Output is correct
27	Correct	3 ms	504 KB	Output is correct
28	Correct	2 ms	376 KB	Output is correct
29	Correct	3 ms	632 KB	Output is correct
30	Correct	3 ms	504 KB	Output is correct

Subtask #3
10.0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	380 KB	Output is correct
2	Correct	2 ms	376 KB	Output is correct
3	Correct	2 ms	380 KB	Output is correct
4	Correct	2 ms	376 KB	Output is correct
5	Correct	2 ms	380 KB	Output is correct
6	Correct	2 ms	376 KB	Output is correct
7	Correct	2 ms	376 KB	Output is correct
8	Correct	2 ms	376 KB	Output is correct
9	Correct	2 ms	376 KB	Output is correct
10	Correct	2 ms	376 KB	Output is correct
11	Correct	2 ms	376 KB	Output is correct
12	Correct	2 ms	376 KB	Output is correct
13	Correct	2 ms	376 KB	Output is correct
14	Correct	2 ms	376 KB	Output is correct
15	Correct	2 ms	376 KB	Output is correct
16	Correct	3 ms	760 KB	Output is correct
17	Correct	3 ms	888 KB	Output is correct
18	Correct	3 ms	1016 KB	Output is correct
19	Correct	3 ms	1016 KB	Output is correct
20	Correct	4 ms	1016 KB	Output is correct
21	Correct	3 ms	1016 KB	Output is correct
22	Correct	3 ms	888 KB	Output is correct
23	Correct	3 ms	764 KB	Output is correct
24	Correct	3 ms	504 KB	Output is correct
25	Correct	4 ms	1016 KB	Output is correct
26	Correct	3 ms	376 KB	Output is correct
27	Correct	3 ms	504 KB	Output is correct
28	Correct	2 ms	376 KB	Output is correct
29	Correct	3 ms	632 KB	Output is correct
30	Correct	3 ms	504 KB	Output is correct
31	Correct	8 ms	2680 KB	Output is correct
32	Correct	10 ms	3320 KB	Output is correct
33	Correct	12 ms	3960 KB	Output is correct
34	Correct	11 ms	3832 KB	Output is correct
35	Correct	13 ms	4728 KB	Output is correct
36	Correct	12 ms	4604 KB	Output is correct
37	Correct	10 ms	3960 KB	Output is correct
38	Correct	9 ms	3192 KB	Output is correct
39	Correct	6 ms	888 KB	Output is correct
40	Correct	13 ms	4440 KB	Output is correct
41	Correct	6 ms	888 KB	Output is correct
42	Correct	8 ms	1528 KB	Output is correct
43	Correct	6 ms	888 KB	Output is correct
44	Correct	9 ms	2168 KB	Output is correct
45	Correct	8 ms	2040 KB	Output is correct

Subtask #4
36.0 / 36.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	380 KB	Output is correct
2	Correct	2 ms	376 KB	Output is correct
3	Correct	2 ms	380 KB	Output is correct
4	Correct	2 ms	376 KB	Output is correct
5	Correct	2 ms	380 KB	Output is correct
6	Correct	2 ms	376 KB	Output is correct
7	Correct	2 ms	376 KB	Output is correct
8	Correct	2 ms	376 KB	Output is correct
9	Correct	2 ms	376 KB	Output is correct
10	Correct	2 ms	376 KB	Output is correct
11	Correct	2 ms	376 KB	Output is correct
12	Correct	2 ms	376 KB	Output is correct
13	Correct	2 ms	376 KB	Output is correct
14	Correct	2 ms	376 KB	Output is correct
15	Correct	2 ms	376 KB	Output is correct
16	Correct	3 ms	760 KB	Output is correct
17	Correct	3 ms	888 KB	Output is correct
18	Correct	3 ms	1016 KB	Output is correct
19	Correct	3 ms	1016 KB	Output is correct
20	Correct	4 ms	1016 KB	Output is correct
21	Correct	3 ms	1016 KB	Output is correct
22	Correct	3 ms	888 KB	Output is correct
23	Correct	3 ms	764 KB	Output is correct
24	Correct	3 ms	504 KB	Output is correct
25	Correct	4 ms	1016 KB	Output is correct
26	Correct	3 ms	376 KB	Output is correct
27	Correct	3 ms	504 KB	Output is correct
28	Correct	2 ms	376 KB	Output is correct
29	Correct	3 ms	632 KB	Output is correct
30	Correct	3 ms	504 KB	Output is correct
31	Correct	8 ms	2680 KB	Output is correct
32	Correct	10 ms	3320 KB	Output is correct
33	Correct	12 ms	3960 KB	Output is correct
34	Correct	11 ms	3832 KB	Output is correct
35	Correct	13 ms	4728 KB	Output is correct
36	Correct	12 ms	4604 KB	Output is correct
37	Correct	10 ms	3960 KB	Output is correct
38	Correct	9 ms	3192 KB	Output is correct
39	Correct	6 ms	888 KB	Output is correct
40	Correct	13 ms	4440 KB	Output is correct
41	Correct	6 ms	888 KB	Output is correct
42	Correct	8 ms	1528 KB	Output is correct
43	Correct	6 ms	888 KB	Output is correct
44	Correct	9 ms	2168 KB	Output is correct
45	Correct	8 ms	2040 KB	Output is correct
46	Correct	177 ms	54252 KB	Output is correct
47	Correct	218 ms	61636 KB	Output is correct
48	Correct	315 ms	123572 KB	Output is correct
49	Correct	341 ms	132844 KB	Output is correct
50	Correct	385 ms	147064 KB	Output is correct
51	Correct	345 ms	144648 KB	Output is correct
52	Correct	174 ms	72440 KB	Output is correct
53	Correct	105 ms	43580 KB	Output is correct
54	Correct	151 ms	19980 KB	Output is correct
55	Correct	363 ms	139840 KB	Output is correct
56	Correct	238 ms	64516 KB	Output is correct
57	Correct	208 ms	53240 KB	Output is correct
58	Correct	223 ms	58820 KB	Output is correct
59	Correct	270 ms	83320 KB	Output is correct
60	Correct	262 ms	82936 KB	Output is correct

Subtask #5
0 / 27.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	380 KB	Output is correct
2	Correct	2 ms	376 KB	Output is correct
3	Correct	2 ms	380 KB	Output is correct
4	Correct	2 ms	376 KB	Output is correct
5	Correct	2 ms	380 KB	Output is correct
6	Correct	2 ms	376 KB	Output is correct
7	Correct	2 ms	376 KB	Output is correct
8	Correct	2 ms	376 KB	Output is correct
9	Correct	2 ms	376 KB	Output is correct
10	Correct	2 ms	376 KB	Output is correct
11	Correct	2 ms	376 KB	Output is correct
12	Correct	2 ms	376 KB	Output is correct
13	Correct	2 ms	376 KB	Output is correct
14	Correct	2 ms	376 KB	Output is correct
15	Correct	2 ms	376 KB	Output is correct
16	Correct	3 ms	760 KB	Output is correct
17	Correct	3 ms	888 KB	Output is correct
18	Correct	3 ms	1016 KB	Output is correct
19	Correct	3 ms	1016 KB	Output is correct
20	Correct	4 ms	1016 KB	Output is correct
21	Correct	3 ms	1016 KB	Output is correct
22	Correct	3 ms	888 KB	Output is correct
23	Correct	3 ms	764 KB	Output is correct
24	Correct	3 ms	504 KB	Output is correct
25	Correct	4 ms	1016 KB	Output is correct
26	Correct	3 ms	376 KB	Output is correct
27	Correct	3 ms	504 KB	Output is correct
28	Correct	2 ms	376 KB	Output is correct
29	Correct	3 ms	632 KB	Output is correct
30	Correct	3 ms	504 KB	Output is correct
31	Correct	8 ms	2680 KB	Output is correct
32	Correct	10 ms	3320 KB	Output is correct
33	Correct	12 ms	3960 KB	Output is correct
34	Correct	11 ms	3832 KB	Output is correct
35	Correct	13 ms	4728 KB	Output is correct
36	Correct	12 ms	4604 KB	Output is correct
37	Correct	10 ms	3960 KB	Output is correct
38	Correct	9 ms	3192 KB	Output is correct
39	Correct	6 ms	888 KB	Output is correct
40	Correct	13 ms	4440 KB	Output is correct
41	Correct	6 ms	888 KB	Output is correct
42	Correct	8 ms	1528 KB	Output is correct
43	Correct	6 ms	888 KB	Output is correct
44	Correct	9 ms	2168 KB	Output is correct
45	Correct	8 ms	2040 KB	Output is correct
46	Correct	177 ms	54252 KB	Output is correct
47	Correct	218 ms	61636 KB	Output is correct
48	Correct	315 ms	123572 KB	Output is correct
49	Correct	341 ms	132844 KB	Output is correct
50	Correct	385 ms	147064 KB	Output is correct
51	Correct	345 ms	144648 KB	Output is correct
52	Correct	174 ms	72440 KB	Output is correct
53	Correct	105 ms	43580 KB	Output is correct
54	Correct	151 ms	19980 KB	Output is correct
55	Correct	363 ms	139840 KB	Output is correct
56	Correct	238 ms	64516 KB	Output is correct
57	Correct	208 ms	53240 KB	Output is correct
58	Correct	223 ms	58820 KB	Output is correct
59	Correct	270 ms	83320 KB	Output is correct
60	Correct	262 ms	82936 KB	Output is correct
61	Correct	872 ms	250692 KB	Output is correct
62	Correct	914 ms	241036 KB	Output is correct
63	Runtime error	934 ms	262144 KB	Execution killed with signal 9 (could be triggered by violating memory limits)
64	Halted	0 ms	0 KB	-

Submission #172972

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