답안 #200858

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
200858	2020-02-08T10:21:25 Z	a1_N	Bigger segments (IZhO19_segments)	C++14	73 / 100	693 ms	262148 KB

segments

#include <bits/stdc++.h>

#define F first
#define S second

using namespace std;

const int N = (int)5e5 + 5;
const long long M = (long long)1e15;
    
int n,a[N];

long long pref[N];

pair<int,long long> dp[N];

struct tree{
	tree *left,*right;
	pair<int,long long> mx;
	tree(): left(NULL), right(NULL), mx(make_pair(0,0LL)) {}
}; 

tree *root = new tree();

pair<int,long long> get_mx(tree *t){
	return (t != NULL) ? (t->mx) : make_pair(0,0LL);
}

void upd(tree *t,long long tl,long long tr,long long pos,pair<int,long long> val){
	if(tl == tr){
		t->mx = val;
		return;
	}
	long long tm = (tl + tr) / 2;
	if(pos <= tm){
		if(t->left == NULL) t->left = new tree();
		upd(t->left,tl,tm,pos,val);		
	}
	else{
		if(t->right == NULL) t->right = new tree();
		upd(t->right,tm + 1,tr,pos,val);	
	}
	t->mx = max(get_mx(t->left),get_mx(t->right));
}

pair<int,long long> get(tree *t,long long tl,long long tr,long long l,long long r){
	if(l <= tl && tr <= r) return t->mx;
	if(l > tr || r < tl) return make_pair(0,0LL);
	long long tm = (tl + tr) / 2;
	pair<int,long long> mx1 = (t->left != NULL) ? get(t->left,tl,tm,l,r) : make_pair(0,0LL);
	pair<int,long long> mx2 = (t->right != NULL) ? get(t->right,tm + 1,tr,l,r) : make_pair(0,0LL);
	return max(mx1,mx2);
}

int main(){
	ios_base::sync_with_stdio(0),cin.tie(0),cout.tie(0);
	cin >> n;
	for(int i = 1; i <= n; i++){
		cin >> a[i];
		pref[i] = pref[i - 1] + a[i];
	}
	dp[1] = make_pair(1,a[1]);
	upd(root,1,M,pref[1] + dp[1].S,make_pair(dp[1].F,1));
	for(int i = 2; i <= n; i++){
		dp[i] = make_pair(dp[i - 1].F,dp[i - 1].S + a[i]);
		pair<int,long long> cur = get(root,1,M,1,pref[i]);
		if(cur.F > 0) dp[i] = make_pair(cur.F + 1,pref[i] - pref[cur.S]);
		/* pref[i] - pref[j] >= dp[j].S 
			pref[i] >= pref[j] + dp[j].S

			1) we update value in position pref[j] + dp[j].S
			2) when we want to find answer satisfying condition for this position we use segment tree
		*/
		upd(root,1,M,pref[i] + dp[i].S,make_pair(dp[i].F,i));	
	}
	cout << dp[n].F;
	return 0;
}

Subtask #1
13.0 / 13.0

#	결과	실행 시간	메모리	Grader output
1	Correct	5 ms	376 KB	Output is correct
2	Correct	5 ms	376 KB	Output is correct
3	Correct	5 ms	376 KB	Output is correct
4	Correct	5 ms	376 KB	Output is correct
5	Correct	5 ms	376 KB	Output is correct
6	Correct	5 ms	376 KB	Output is correct
7	Correct	5 ms	376 KB	Output is correct
8	Correct	5 ms	376 KB	Output is correct
9	Correct	5 ms	376 KB	Output is correct
10	Correct	5 ms	380 KB	Output is correct
11	Correct	5 ms	376 KB	Output is correct
12	Correct	5 ms	376 KB	Output is correct
13	Correct	5 ms	376 KB	Output is correct
14	Correct	5 ms	376 KB	Output is correct
15	Correct	5 ms	380 KB	Output is correct

Subtask #2
14.0 / 14.0

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

Subtask #3
10.0 / 10.0

#	결과	실행 시간	메모리	Grader output
1	Correct	5 ms	376 KB	Output is correct
2	Correct	5 ms	376 KB	Output is correct
3	Correct	5 ms	376 KB	Output is correct
4	Correct	5 ms	376 KB	Output is correct
5	Correct	5 ms	376 KB	Output is correct
6	Correct	5 ms	376 KB	Output is correct
7	Correct	5 ms	376 KB	Output is correct
8	Correct	5 ms	376 KB	Output is correct
9	Correct	5 ms	376 KB	Output is correct
10	Correct	5 ms	380 KB	Output is correct
11	Correct	5 ms	376 KB	Output is correct
12	Correct	5 ms	376 KB	Output is correct
13	Correct	5 ms	376 KB	Output is correct
14	Correct	5 ms	376 KB	Output is correct
15	Correct	5 ms	380 KB	Output is correct
16	Correct	5 ms	764 KB	Output is correct
17	Correct	6 ms	888 KB	Output is correct
18	Correct	6 ms	1016 KB	Output is correct
19	Correct	6 ms	1016 KB	Output is correct
20	Correct	6 ms	1016 KB	Output is correct
21	Correct	6 ms	1016 KB	Output is correct
22	Correct	6 ms	1016 KB	Output is correct
23	Correct	5 ms	760 KB	Output is correct
24	Correct	5 ms	380 KB	Output is correct
25	Correct	6 ms	1016 KB	Output is correct
26	Correct	5 ms	504 KB	Output is correct
27	Correct	5 ms	504 KB	Output is correct
28	Correct	5 ms	504 KB	Output is correct
29	Correct	6 ms	632 KB	Output is correct
30	Correct	5 ms	632 KB	Output is correct
31	Correct	10 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	16 ms	4728 KB	Output is correct
36	Correct	12 ms	4728 KB	Output is correct
37	Correct	10 ms	3960 KB	Output is correct
38	Correct	9 ms	3192 KB	Output is correct
39	Correct	10 ms	1016 KB	Output is correct
40	Correct	13 ms	4472 KB	Output is correct
41	Correct	7 ms	1016 KB	Output is correct
42	Correct	11 ms	1656 KB	Output is correct
43	Correct	9 ms	888 KB	Output is correct
44	Correct	9 ms	2168 KB	Output is correct
45	Correct	9 ms	2168 KB	Output is correct

Subtask #4
36.0 / 36.0

#	결과	실행 시간	메모리	Grader output
1	Correct	5 ms	376 KB	Output is correct
2	Correct	5 ms	376 KB	Output is correct
3	Correct	5 ms	376 KB	Output is correct
4	Correct	5 ms	376 KB	Output is correct
5	Correct	5 ms	376 KB	Output is correct
6	Correct	5 ms	376 KB	Output is correct
7	Correct	5 ms	376 KB	Output is correct
8	Correct	5 ms	376 KB	Output is correct
9	Correct	5 ms	376 KB	Output is correct
10	Correct	5 ms	380 KB	Output is correct
11	Correct	5 ms	376 KB	Output is correct
12	Correct	5 ms	376 KB	Output is correct
13	Correct	5 ms	376 KB	Output is correct
14	Correct	5 ms	376 KB	Output is correct
15	Correct	5 ms	380 KB	Output is correct
16	Correct	5 ms	764 KB	Output is correct
17	Correct	6 ms	888 KB	Output is correct
18	Correct	6 ms	1016 KB	Output is correct
19	Correct	6 ms	1016 KB	Output is correct
20	Correct	6 ms	1016 KB	Output is correct
21	Correct	6 ms	1016 KB	Output is correct
22	Correct	6 ms	1016 KB	Output is correct
23	Correct	5 ms	760 KB	Output is correct
24	Correct	5 ms	380 KB	Output is correct
25	Correct	6 ms	1016 KB	Output is correct
26	Correct	5 ms	504 KB	Output is correct
27	Correct	5 ms	504 KB	Output is correct
28	Correct	5 ms	504 KB	Output is correct
29	Correct	6 ms	632 KB	Output is correct
30	Correct	5 ms	632 KB	Output is correct
31	Correct	10 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	16 ms	4728 KB	Output is correct
36	Correct	12 ms	4728 KB	Output is correct
37	Correct	10 ms	3960 KB	Output is correct
38	Correct	9 ms	3192 KB	Output is correct
39	Correct	10 ms	1016 KB	Output is correct
40	Correct	13 ms	4472 KB	Output is correct
41	Correct	7 ms	1016 KB	Output is correct
42	Correct	11 ms	1656 KB	Output is correct
43	Correct	9 ms	888 KB	Output is correct
44	Correct	9 ms	2168 KB	Output is correct
45	Correct	9 ms	2168 KB	Output is correct
46	Correct	135 ms	54520 KB	Output is correct
47	Correct	158 ms	61944 KB	Output is correct
48	Correct	239 ms	123900 KB	Output is correct
49	Correct	242 ms	133112 KB	Output is correct
50	Correct	274 ms	147448 KB	Output is correct
51	Correct	252 ms	144888 KB	Output is correct
52	Correct	126 ms	72568 KB	Output is correct
53	Correct	76 ms	43768 KB	Output is correct
54	Correct	120 ms	20344 KB	Output is correct
55	Correct	252 ms	140152 KB	Output is correct
56	Correct	176 ms	64760 KB	Output is correct
57	Correct	163 ms	53624 KB	Output is correct
58	Correct	163 ms	59000 KB	Output is correct
59	Correct	203 ms	83704 KB	Output is correct
60	Correct	189 ms	83192 KB	Output is correct

Subtask #5
0 / 27.0

#	결과	실행 시간	메모리	Grader output
1	Correct	5 ms	376 KB	Output is correct
2	Correct	5 ms	376 KB	Output is correct
3	Correct	5 ms	376 KB	Output is correct
4	Correct	5 ms	376 KB	Output is correct
5	Correct	5 ms	376 KB	Output is correct
6	Correct	5 ms	376 KB	Output is correct
7	Correct	5 ms	376 KB	Output is correct
8	Correct	5 ms	376 KB	Output is correct
9	Correct	5 ms	376 KB	Output is correct
10	Correct	5 ms	380 KB	Output is correct
11	Correct	5 ms	376 KB	Output is correct
12	Correct	5 ms	376 KB	Output is correct
13	Correct	5 ms	376 KB	Output is correct
14	Correct	5 ms	376 KB	Output is correct
15	Correct	5 ms	380 KB	Output is correct
16	Correct	5 ms	764 KB	Output is correct
17	Correct	6 ms	888 KB	Output is correct
18	Correct	6 ms	1016 KB	Output is correct
19	Correct	6 ms	1016 KB	Output is correct
20	Correct	6 ms	1016 KB	Output is correct
21	Correct	6 ms	1016 KB	Output is correct
22	Correct	6 ms	1016 KB	Output is correct
23	Correct	5 ms	760 KB	Output is correct
24	Correct	5 ms	380 KB	Output is correct
25	Correct	6 ms	1016 KB	Output is correct
26	Correct	5 ms	504 KB	Output is correct
27	Correct	5 ms	504 KB	Output is correct
28	Correct	5 ms	504 KB	Output is correct
29	Correct	6 ms	632 KB	Output is correct
30	Correct	5 ms	632 KB	Output is correct
31	Correct	10 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	16 ms	4728 KB	Output is correct
36	Correct	12 ms	4728 KB	Output is correct
37	Correct	10 ms	3960 KB	Output is correct
38	Correct	9 ms	3192 KB	Output is correct
39	Correct	10 ms	1016 KB	Output is correct
40	Correct	13 ms	4472 KB	Output is correct
41	Correct	7 ms	1016 KB	Output is correct
42	Correct	11 ms	1656 KB	Output is correct
43	Correct	9 ms	888 KB	Output is correct
44	Correct	9 ms	2168 KB	Output is correct
45	Correct	9 ms	2168 KB	Output is correct
46	Correct	135 ms	54520 KB	Output is correct
47	Correct	158 ms	61944 KB	Output is correct
48	Correct	239 ms	123900 KB	Output is correct
49	Correct	242 ms	133112 KB	Output is correct
50	Correct	274 ms	147448 KB	Output is correct
51	Correct	252 ms	144888 KB	Output is correct
52	Correct	126 ms	72568 KB	Output is correct
53	Correct	76 ms	43768 KB	Output is correct
54	Correct	120 ms	20344 KB	Output is correct
55	Correct	252 ms	140152 KB	Output is correct
56	Correct	176 ms	64760 KB	Output is correct
57	Correct	163 ms	53624 KB	Output is correct
58	Correct	163 ms	59000 KB	Output is correct
59	Correct	203 ms	83704 KB	Output is correct
60	Correct	189 ms	83192 KB	Output is correct
61	Correct	674 ms	252408 KB	Output is correct
62	Correct	660 ms	242680 KB	Output is correct
63	Runtime error	693 ms	262148 KB	Execution killed with signal 9 (could be triggered by violating memory limits)
64	Halted	0 ms	0 KB	-

답안 #200858

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