답안 #203026

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
203026	2020-02-19T03:50:02 Z	a1_N	Bigger segments (IZhO19_segments)	C++14	73 / 100	901 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)5e14;
    
int n,a[N];

long long pref[N];

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

pair<int,int> ZeroPair = {0,0};

struct tree{
	tree *left,*right;
	pair<int,int> mx;
	tree(): left(NULL), right(NULL), mx(ZeroPair) {}
}; 

tree *root = new tree();

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

void upd(tree *t,long long tl,long long tr,long long pos,pair<int,int> 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,int> 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 ZeroPair;
	long long tm = (tl + tr) / 2;
	pair<int,int> mx1 = (t->left != NULL) ? get(t->left,tl,tm,l,r) : ZeroPair;
	pair<int,int> mx2 = (t->right != NULL) ? get(t->right,tm + 1,tr,l,r) : ZeroPair;
	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] = {1,a[1]};
	upd(root,1,M,pref[1] + dp[1].S,{dp[1].F,1});
	for(int i = 2; i <= n; i++){
		dp[i] = {dp[i - 1].F,dp[i - 1].S + a[i]};
		pair<int,int> cur = get(root,1,M,1,pref[i]);
		if(cur.F > 0) dp[i] = {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,{dp[i].F,i});	
	}
	cout << dp[n].F;
	return 0;
}

Subtask #1
13.0 / 13.0

#	결과	실행 시간	메모리	Grader output
1	Correct	6 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	248 KB	Output is correct
9	Correct	5 ms	376 KB	Output is correct
10	Correct	5 ms	376 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	504 KB	Output is correct
14	Correct	5 ms	376 KB	Output is correct
15	Correct	5 ms	376 KB	Output is correct

Subtask #2
14.0 / 14.0

#	결과	실행 시간	메모리	Grader output
1	Correct	6 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	248 KB	Output is correct
9	Correct	5 ms	376 KB	Output is correct
10	Correct	5 ms	376 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	504 KB	Output is correct
14	Correct	5 ms	376 KB	Output is correct
15	Correct	5 ms	376 KB	Output is correct
16	Correct	6 ms	632 KB	Output is correct
17	Correct	6 ms	760 KB	Output is correct
18	Correct	6 ms	760 KB	Output is correct
19	Correct	6 ms	760 KB	Output is correct
20	Correct	6 ms	760 KB	Output is correct
21	Correct	6 ms	888 KB	Output is correct
22	Correct	6 ms	760 KB	Output is correct
23	Correct	6 ms	632 KB	Output is correct
24	Correct	6 ms	376 KB	Output is correct
25	Correct	6 ms	760 KB	Output is correct
26	Correct	5 ms	504 KB	Output is correct
27	Correct	6 ms	376 KB	Output is correct
28	Correct	6 ms	504 KB	Output is correct
29	Correct	6 ms	504 KB	Output is correct
30	Correct	5 ms	504 KB	Output is correct

Subtask #3
10.0 / 10.0

#	결과	실행 시간	메모리	Grader output
1	Correct	6 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	248 KB	Output is correct
9	Correct	5 ms	376 KB	Output is correct
10	Correct	5 ms	376 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	504 KB	Output is correct
14	Correct	5 ms	376 KB	Output is correct
15	Correct	5 ms	376 KB	Output is correct
16	Correct	6 ms	632 KB	Output is correct
17	Correct	6 ms	760 KB	Output is correct
18	Correct	6 ms	760 KB	Output is correct
19	Correct	6 ms	760 KB	Output is correct
20	Correct	6 ms	760 KB	Output is correct
21	Correct	6 ms	888 KB	Output is correct
22	Correct	6 ms	760 KB	Output is correct
23	Correct	6 ms	632 KB	Output is correct
24	Correct	6 ms	376 KB	Output is correct
25	Correct	6 ms	760 KB	Output is correct
26	Correct	5 ms	504 KB	Output is correct
27	Correct	6 ms	376 KB	Output is correct
28	Correct	6 ms	504 KB	Output is correct
29	Correct	6 ms	504 KB	Output is correct
30	Correct	5 ms	504 KB	Output is correct
31	Correct	9 ms	1912 KB	Output is correct
32	Correct	11 ms	2424 KB	Output is correct
33	Correct	12 ms	2812 KB	Output is correct
34	Correct	11 ms	2680 KB	Output is correct
35	Correct	13 ms	3320 KB	Output is correct
36	Correct	14 ms	3320 KB	Output is correct
37	Correct	11 ms	2808 KB	Output is correct
38	Correct	10 ms	2296 KB	Output is correct
39	Correct	8 ms	760 KB	Output is correct
40	Correct	12 ms	3192 KB	Output is correct
41	Correct	8 ms	760 KB	Output is correct
42	Correct	9 ms	1272 KB	Output is correct
43	Correct	9 ms	760 KB	Output is correct
44	Correct	9 ms	1528 KB	Output is correct
45	Correct	9 ms	1528 KB	Output is correct

Subtask #4
36.0 / 36.0

#	결과	실행 시간	메모리	Grader output
1	Correct	6 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	248 KB	Output is correct
9	Correct	5 ms	376 KB	Output is correct
10	Correct	5 ms	376 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	504 KB	Output is correct
14	Correct	5 ms	376 KB	Output is correct
15	Correct	5 ms	376 KB	Output is correct
16	Correct	6 ms	632 KB	Output is correct
17	Correct	6 ms	760 KB	Output is correct
18	Correct	6 ms	760 KB	Output is correct
19	Correct	6 ms	760 KB	Output is correct
20	Correct	6 ms	760 KB	Output is correct
21	Correct	6 ms	888 KB	Output is correct
22	Correct	6 ms	760 KB	Output is correct
23	Correct	6 ms	632 KB	Output is correct
24	Correct	6 ms	376 KB	Output is correct
25	Correct	6 ms	760 KB	Output is correct
26	Correct	5 ms	504 KB	Output is correct
27	Correct	6 ms	376 KB	Output is correct
28	Correct	6 ms	504 KB	Output is correct
29	Correct	6 ms	504 KB	Output is correct
30	Correct	5 ms	504 KB	Output is correct
31	Correct	9 ms	1912 KB	Output is correct
32	Correct	11 ms	2424 KB	Output is correct
33	Correct	12 ms	2812 KB	Output is correct
34	Correct	11 ms	2680 KB	Output is correct
35	Correct	13 ms	3320 KB	Output is correct
36	Correct	14 ms	3320 KB	Output is correct
37	Correct	11 ms	2808 KB	Output is correct
38	Correct	10 ms	2296 KB	Output is correct
39	Correct	8 ms	760 KB	Output is correct
40	Correct	12 ms	3192 KB	Output is correct
41	Correct	8 ms	760 KB	Output is correct
42	Correct	9 ms	1272 KB	Output is correct
43	Correct	9 ms	760 KB	Output is correct
44	Correct	9 ms	1528 KB	Output is correct
45	Correct	9 ms	1528 KB	Output is correct
46	Correct	128 ms	37752 KB	Output is correct
47	Correct	151 ms	42744 KB	Output is correct
48	Correct	215 ms	84612 KB	Output is correct
49	Correct	229 ms	90744 KB	Output is correct
50	Correct	251 ms	100216 KB	Output is correct
51	Correct	239 ms	98552 KB	Output is correct
52	Correct	118 ms	49528 KB	Output is correct
53	Correct	70 ms	29816 KB	Output is correct
54	Correct	106 ms	14816 KB	Output is correct
55	Correct	236 ms	95480 KB	Output is correct
56	Correct	170 ms	44688 KB	Output is correct
57	Correct	163 ms	37216 KB	Output is correct
58	Correct	169 ms	40828 KB	Output is correct
59	Correct	210 ms	57336 KB	Output is correct
60	Correct	197 ms	57084 KB	Output is correct

Subtask #5
0 / 27.0

#	결과	실행 시간	메모리	Grader output
1	Correct	6 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	248 KB	Output is correct
9	Correct	5 ms	376 KB	Output is correct
10	Correct	5 ms	376 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	504 KB	Output is correct
14	Correct	5 ms	376 KB	Output is correct
15	Correct	5 ms	376 KB	Output is correct
16	Correct	6 ms	632 KB	Output is correct
17	Correct	6 ms	760 KB	Output is correct
18	Correct	6 ms	760 KB	Output is correct
19	Correct	6 ms	760 KB	Output is correct
20	Correct	6 ms	760 KB	Output is correct
21	Correct	6 ms	888 KB	Output is correct
22	Correct	6 ms	760 KB	Output is correct
23	Correct	6 ms	632 KB	Output is correct
24	Correct	6 ms	376 KB	Output is correct
25	Correct	6 ms	760 KB	Output is correct
26	Correct	5 ms	504 KB	Output is correct
27	Correct	6 ms	376 KB	Output is correct
28	Correct	6 ms	504 KB	Output is correct
29	Correct	6 ms	504 KB	Output is correct
30	Correct	5 ms	504 KB	Output is correct
31	Correct	9 ms	1912 KB	Output is correct
32	Correct	11 ms	2424 KB	Output is correct
33	Correct	12 ms	2812 KB	Output is correct
34	Correct	11 ms	2680 KB	Output is correct
35	Correct	13 ms	3320 KB	Output is correct
36	Correct	14 ms	3320 KB	Output is correct
37	Correct	11 ms	2808 KB	Output is correct
38	Correct	10 ms	2296 KB	Output is correct
39	Correct	8 ms	760 KB	Output is correct
40	Correct	12 ms	3192 KB	Output is correct
41	Correct	8 ms	760 KB	Output is correct
42	Correct	9 ms	1272 KB	Output is correct
43	Correct	9 ms	760 KB	Output is correct
44	Correct	9 ms	1528 KB	Output is correct
45	Correct	9 ms	1528 KB	Output is correct
46	Correct	128 ms	37752 KB	Output is correct
47	Correct	151 ms	42744 KB	Output is correct
48	Correct	215 ms	84612 KB	Output is correct
49	Correct	229 ms	90744 KB	Output is correct
50	Correct	251 ms	100216 KB	Output is correct
51	Correct	239 ms	98552 KB	Output is correct
52	Correct	118 ms	49528 KB	Output is correct
53	Correct	70 ms	29816 KB	Output is correct
54	Correct	106 ms	14816 KB	Output is correct
55	Correct	236 ms	95480 KB	Output is correct
56	Correct	170 ms	44688 KB	Output is correct
57	Correct	163 ms	37216 KB	Output is correct
58	Correct	169 ms	40828 KB	Output is correct
59	Correct	210 ms	57336 KB	Output is correct
60	Correct	197 ms	57084 KB	Output is correct
61	Correct	652 ms	174968 KB	Output is correct
62	Correct	658 ms	168444 KB	Output is correct
63	Correct	901 ms	213080 KB	Output is correct
64	Runtime error	721 ms	262148 KB	Execution killed with signal 9 (could be triggered by violating memory limits)
65	Halted	0 ms	0 KB	-

답안 #203026

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