oj.uz

Submission #707775

# Submission time Handle Problem Language Result Execution time Memory
707775 2023-03-10T05:30:55 Z penguin133 Bigger segments (IZhO19_segments) C++17
100 / 100
 95 ms 28196 KB 
#include <bits/stdc++.h>
using namespace std;
 
#define int long long
#define pi pair<int, int>
#define pii pair<int, pi>
#define fi first
#define se second
#ifdef _WIN32
#define getchar_unlocked _getchar_nolock
#endif
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
 
int n, A[500005], P[500005];
pi dp[500005];
 
struct node{
	int s, e, m;
	node *l, *r;
	pi val;
	node(int _s, int _e){
		s = _s, e = _e, m = (s + e) >> 1;
		val = {-1e18, -1e18};
		l = r = nullptr;
	}
	
	void mc(){
		if(l != nullptr)return;
		if(s == e)return;
		l = new node(s, m);
		r = new node(m+1, e);
	}
	
	void upd(int a, pi b){
		if(s == e) val = max(val, b);
		else{
			mc();
			if(a <= m)l->upd(a, b);
			else r->upd(a, b);
			val = max(l->val, r->val);
		}
	}
	
	pi qry(int a, int b){
		if(s == a && b == e)return val;
		if(l == nullptr)return val;
		if(b <= m)return l->qry(a, b);
		else if(a > m)return r->qry(a, b);
		else return max(l->qry(a, m), r->qry(m+1, b));
	}
	
}*root;
 
 
 
void solve(){
	//root = new node(0, 1e15);
	cin >> n;
	for(int i=1;i<=n;i++)cin >> A[i], P[i] = P[i-1] + A[i];
	//root->upd(0, {0, 0});
	priority_queue <pii, vector<pii>, greater<pii> > pq;
	pi mx = {-1e18, -1e18};
	pq.push({0, {0, 0}});
	for(int i=1;i<=n;i++){
		dp[i] = {-1e18, -1e18};
		while(!pq.empty() && pq.top().fi <= P[i]){
			pii tmp = pq.top(); pq.pop();
			mx = max(mx, tmp.se);
		}
		dp[i] = mx;
		dp[i].fi++;
		dp[i].se -= P[i];
		pq.push({P[i] - dp[i].se, {dp[i].fi, P[i]}});
		/*
		for(int j = i - 1; j >= 0; j--){
			if(-dp[j].se <= P[i] - P[j])dp[i] = max(dp[i], {dp[j].fi + 1, P[j] - P[i]});
		}
		*/
	}
	cout << dp[n].fi;
}
 
main(){
	ios::sync_with_stdio(0);cin.tie(0);
	int tc = 1;
	//cin >> tc;
	for(int tc1=1;tc1<=tc;tc1++){
		// cout << "Case #" << tc1 << ": ";
		solve();
	}
}

Compilation message

segments.cpp:83:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   83 | main(){
      | ^~~~

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 0 ms 340 KB Output is correct
13 Correct 0 ms 340 KB Output is correct
14 Correct 0 ms 340 KB Output is correct
15 Correct 0 ms 340 KB Output is correct

Subtask #2
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 0 ms 340 KB Output is correct
13 Correct 0 ms 340 KB Output is correct
14 Correct 0 ms 340 KB Output is correct
15 Correct 0 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 0 ms 340 KB Output is correct
20 Correct 0 ms 340 KB Output is correct
21 Correct 1 ms 340 KB Output is correct
22 Correct 0 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 1 ms 340 KB Output is correct
26 Correct 1 ms 340 KB Output is correct
27 Correct 1 ms 340 KB Output is correct
28 Correct 0 ms 340 KB Output is correct
29 Correct 0 ms 340 KB Output is correct
30 Correct 0 ms 340 KB Output is correct

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 0 ms 340 KB Output is correct
13 Correct 0 ms 340 KB Output is correct
14 Correct 0 ms 340 KB Output is correct
15 Correct 0 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 0 ms 340 KB Output is correct
20 Correct 0 ms 340 KB Output is correct
21 Correct 1 ms 340 KB Output is correct
22 Correct 0 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 1 ms 340 KB Output is correct
26 Correct 1 ms 340 KB Output is correct
27 Correct 1 ms 340 KB Output is correct
28 Correct 0 ms 340 KB Output is correct
29 Correct 0 ms 340 KB Output is correct
30 Correct 0 ms 340 KB Output is correct
31 Correct 1 ms 596 KB Output is correct
32 Correct 1 ms 468 KB Output is correct
33 Correct 1 ms 340 KB Output is correct
34 Correct 1 ms 468 KB Output is correct
35 Correct 1 ms 340 KB Output is correct
36 Correct 1 ms 340 KB Output is correct
37 Correct 1 ms 340 KB Output is correct
38 Correct 1 ms 340 KB Output is correct
39 Correct 1 ms 340 KB Output is correct
40 Correct 2 ms 340 KB Output is correct
41 Correct 1 ms 340 KB Output is correct
42 Correct 1 ms 468 KB Output is correct
43 Correct 1 ms 340 KB Output is correct
44 Correct 1 ms 340 KB Output is correct
45 Correct 1 ms 340 KB Output is correct

Subtask #4
36.0 / 36.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 0 ms 340 KB Output is correct
13 Correct 0 ms 340 KB Output is correct
14 Correct 0 ms 340 KB Output is correct
15 Correct 0 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 0 ms 340 KB Output is correct
20 Correct 0 ms 340 KB Output is correct
21 Correct 1 ms 340 KB Output is correct
22 Correct 0 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 1 ms 340 KB Output is correct
26 Correct 1 ms 340 KB Output is correct
27 Correct 1 ms 340 KB Output is correct
28 Correct 0 ms 340 KB Output is correct
29 Correct 0 ms 340 KB Output is correct
30 Correct 0 ms 340 KB Output is correct
31 Correct 1 ms 596 KB Output is correct
32 Correct 1 ms 468 KB Output is correct
33 Correct 1 ms 340 KB Output is correct
34 Correct 1 ms 468 KB Output is correct
35 Correct 1 ms 340 KB Output is correct
36 Correct 1 ms 340 KB Output is correct
37 Correct 1 ms 340 KB Output is correct
38 Correct 1 ms 340 KB Output is correct
39 Correct 1 ms 340 KB Output is correct
40 Correct 2 ms 340 KB Output is correct
41 Correct 1 ms 340 KB Output is correct
42 Correct 1 ms 468 KB Output is correct
43 Correct 1 ms 340 KB Output is correct
44 Correct 1 ms 340 KB Output is correct
45 Correct 1 ms 340 KB Output is correct
46 Correct 11 ms 6088 KB Output is correct
47 Correct 17 ms 3804 KB Output is correct
48 Correct 18 ms 3904 KB Output is correct
49 Correct 14 ms 4220 KB Output is correct
50 Correct 17 ms 3788 KB Output is correct
51 Correct 19 ms 3808 KB Output is correct
52 Correct 10 ms 2260 KB Output is correct
53 Correct 6 ms 1572 KB Output is correct
54 Correct 16 ms 3664 KB Output is correct
55 Correct 18 ms 3848 KB Output is correct
56 Correct 13 ms 3760 KB Output is correct
57 Correct 15 ms 5184 KB Output is correct
58 Correct 18 ms 4564 KB Output is correct
59 Correct 12 ms 3808 KB Output is correct
60 Correct 13 ms 3788 KB Output is correct

Subtask #5
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 0 ms 340 KB Output is correct
13 Correct 0 ms 340 KB Output is correct
14 Correct 0 ms 340 KB Output is correct
15 Correct 0 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 0 ms 340 KB Output is correct
20 Correct 0 ms 340 KB Output is correct
21 Correct 1 ms 340 KB Output is correct
22 Correct 0 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 1 ms 340 KB Output is correct
26 Correct 1 ms 340 KB Output is correct
27 Correct 1 ms 340 KB Output is correct
28 Correct 0 ms 340 KB Output is correct
29 Correct 0 ms 340 KB Output is correct
30 Correct 0 ms 340 KB Output is correct
31 Correct 1 ms 596 KB Output is correct
32 Correct 1 ms 468 KB Output is correct
33 Correct 1 ms 340 KB Output is correct
34 Correct 1 ms 468 KB Output is correct
35 Correct 1 ms 340 KB Output is correct
36 Correct 1 ms 340 KB Output is correct
37 Correct 1 ms 340 KB Output is correct
38 Correct 1 ms 340 KB Output is correct
39 Correct 1 ms 340 KB Output is correct
40 Correct 2 ms 340 KB Output is correct
41 Correct 1 ms 340 KB Output is correct
42 Correct 1 ms 468 KB Output is correct
43 Correct 1 ms 340 KB Output is correct
44 Correct 1 ms 340 KB Output is correct
45 Correct 1 ms 340 KB Output is correct
46 Correct 11 ms 6088 KB Output is correct
47 Correct 17 ms 3804 KB Output is correct
48 Correct 18 ms 3904 KB Output is correct
49 Correct 14 ms 4220 KB Output is correct
50 Correct 17 ms 3788 KB Output is correct
51 Correct 19 ms 3808 KB Output is correct
52 Correct 10 ms 2260 KB Output is correct
53 Correct 6 ms 1572 KB Output is correct
54 Correct 16 ms 3664 KB Output is correct
55 Correct 18 ms 3848 KB Output is correct
56 Correct 13 ms 3760 KB Output is correct
57 Correct 15 ms 5184 KB Output is correct
58 Correct 18 ms 4564 KB Output is correct
59 Correct 12 ms 3808 KB Output is correct
60 Correct 13 ms 3788 KB Output is correct
61 Correct 54 ms 28196 KB Output is correct
62 Correct 70 ms 22292 KB Output is correct
63 Correct 90 ms 18616 KB Output is correct
64 Correct 70 ms 16440 KB Output is correct
65 Correct 71 ms 16348 KB Output is correct
66 Correct 95 ms 16480 KB Output is correct
67 Correct 75 ms 13368 KB Output is correct
68 Correct 37 ms 6880 KB Output is correct
69 Correct 75 ms 16344 KB Output is correct
70 Correct 94 ms 16408 KB Output is correct
71 Correct 49 ms 16404 KB Output is correct
72 Correct 69 ms 21140 KB Output is correct
73 Correct 60 ms 18212 KB Output is correct
74 Correct 58 ms 16460 KB Output is correct
75 Correct 66 ms 16524 KB Output is correct