oj.uz

Submission #653974

# Submission time Handle Problem Language Result Execution time Memory
653974 2022-10-29T06:33:35 Z pavement Cigle (COI21_cigle) C++17
48 / 100
 1000 ms 102344 KB 
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace std;
using namespace __gnu_pbds;
#ifdef _WIN32
#define getchar_unlocked _getchar_nolock
#endif
#define int long long
#define mp make_pair
#define mt make_tuple
#define pb push_back
#define ppb pop_back
#define eb emplace_back
#define g0(a) get<0>(a)
#define g1(a) get<1>(a)
#define g2(a) get<2>(a)
#define g3(a) get<3>(a)
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
using db = double;
using ll = long long;
using ld = long double;
using ii = pair<int, int>;
using iii = tuple<int, int, int>;
using iiii = tuple<int, int, int, int>;
template<class key, class value = null_type, class cmp = less<key> >
using ordered_set = tree<key, value, cmp, rb_tree_tag, tree_order_statistics_node_update>;

int N, ans, d[5005], p[5005], dp[5005][5005];

struct node {
	node *left, *right;
	int S, E, val, pv;
	node(int _s, int _e) : S(_s), E(_e), val(0), pv(0) {
		if (S == E) {
			return;
		}
		int M = (S + E) >> 1;
		left = new node(S, M);
		right = new node(M + 1, E);
	}
	void prop() {
		if (S == E || !pv) return;
		left->val += pv;
		left->pv += pv;
		right->val += pv;
		right->pv += pv;
		pv = 0;
	}
	void clear() {
		val = pv = 0;
		if (S != E) {
			left->clear();
			right->clear();
		}
	}
	void upd(int l, int r, int v) {
		if (l > E || r < S) return;
		if (l <= S && E <= r) {
			val += v;
			pv += v;
			return;
		}
		prop();
		left->upd(l, r, v);
		right->upd(l, r, v);
		val = max(left->val, right->val);
	}
} *root;

main() {
	ios::sync_with_stdio(0);
	cin.tie(0);
	cin >> N;
	for (int i = 1; i <= N; i++) {
		cin >> d[i];
		p[i] = p[i - 1] + d[i];
	}
	root = new node(1, N);
	for (int j = N; j >= 1; j--) {
		root->clear();
		for (int k = j + 1; k <= N; k++) {
			root->upd(k, k, dp[j + 1][k]);
		}
		for (int i = j; i >= 1; i--) {
			int lo = j + 1, hi = N, ans = -1;
			while (lo <= hi) {
				int mid = (lo + hi) >> 1;
				if (p[mid] - p[j] == p[j] - p[i - 1]) {
					ans = mid;
					break;
				} else if (p[mid] - p[j] > p[j] - p[i - 1]) hi = mid - 1;
				else lo = mid + 1;
			}
			dp[i][j] = root->val;
			//~ cout << "DP " << i << ' ' << j << ' ' << root->val << '\n';
			if (ans != -1) {
				root->upd(ans + 1, N, 1);
				//~ cout << " + " << i << ' ' << ans << '\n';
			}
		}
	}
	for (int i = 1; i <= N; i++) {
		ans = max(ans, dp[1][i]);
	}
	cout << ans << '\n';
}

Compilation message

cigle.cpp:71:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   71 | main() {
      | ^~~~

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 336 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct

Subtask #2
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 336 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 596 KB Output is correct
11 Correct 1 ms 596 KB Output is correct
12 Correct 1 ms 596 KB Output is correct
13 Correct 1 ms 596 KB Output is correct
14 Correct 1 ms 596 KB Output is correct
15 Correct 1 ms 596 KB Output is correct
16 Correct 1 ms 596 KB Output is correct
17 Correct 1 ms 596 KB Output is correct
18 Correct 1 ms 596 KB Output is correct
19 Correct 1 ms 596 KB Output is correct
20 Correct 1 ms 596 KB Output is correct

Subtask #3
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 3432 KB Output is correct
2 Correct 16 ms 3432 KB Output is correct
3 Correct 15 ms 3320 KB Output is correct
4 Correct 18 ms 3416 KB Output is correct
5 Correct 15 ms 3412 KB Output is correct
6 Correct 19 ms 3296 KB Output is correct
7 Correct 16 ms 3412 KB Output is correct
8 Correct 16 ms 3412 KB Output is correct
9 Correct 15 ms 3412 KB Output is correct
10 Correct 15 ms 3412 KB Output is correct
11 Correct 14 ms 3412 KB Output is correct
12 Correct 17 ms 3412 KB Output is correct

Subtask #4
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 336 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 596 KB Output is correct
11 Correct 1 ms 596 KB Output is correct
12 Correct 1 ms 596 KB Output is correct
13 Correct 1 ms 596 KB Output is correct
14 Correct 1 ms 596 KB Output is correct
15 Correct 1 ms 596 KB Output is correct
16 Correct 1 ms 596 KB Output is correct
17 Correct 1 ms 596 KB Output is correct
18 Correct 1 ms 596 KB Output is correct
19 Correct 1 ms 596 KB Output is correct
20 Correct 1 ms 596 KB Output is correct
21 Correct 15 ms 3432 KB Output is correct
22 Correct 16 ms 3432 KB Output is correct
23 Correct 15 ms 3320 KB Output is correct
24 Correct 18 ms 3416 KB Output is correct
25 Correct 15 ms 3412 KB Output is correct
26 Correct 19 ms 3296 KB Output is correct
27 Correct 16 ms 3412 KB Output is correct
28 Correct 16 ms 3412 KB Output is correct
29 Correct 15 ms 3412 KB Output is correct
30 Correct 15 ms 3412 KB Output is correct
31 Correct 14 ms 3412 KB Output is correct
32 Correct 17 ms 3412 KB Output is correct
33 Correct 14 ms 3388 KB Output is correct
34 Correct 15 ms 3412 KB Output is correct
35 Correct 15 ms 3328 KB Output is correct
36 Correct 18 ms 3432 KB Output is correct
37 Correct 16 ms 3408 KB Output is correct
38 Correct 16 ms 3356 KB Output is correct
39 Correct 16 ms 3412 KB Output is correct
40 Correct 12 ms 3368 KB Output is correct
41 Correct 12 ms 3312 KB Output is correct
42 Correct 12 ms 3412 KB Output is correct
43 Correct 12 ms 3412 KB Output is correct
44 Correct 12 ms 3412 KB Output is correct
45 Correct 13 ms 3424 KB Output is correct
46 Correct 12 ms 3344 KB Output is correct
47 Correct 12 ms 3332 KB Output is correct
48 Correct 13 ms 3412 KB Output is correct
49 Correct 12 ms 3408 KB Output is correct

Subtask #5
0 / 52.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 336 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 596 KB Output is correct
11 Correct 1 ms 596 KB Output is correct
12 Correct 1 ms 596 KB Output is correct
13 Correct 1 ms 596 KB Output is correct
14 Correct 1 ms 596 KB Output is correct
15 Correct 1 ms 596 KB Output is correct
16 Correct 1 ms 596 KB Output is correct
17 Correct 1 ms 596 KB Output is correct
18 Correct 1 ms 596 KB Output is correct
19 Correct 1 ms 596 KB Output is correct
20 Correct 1 ms 596 KB Output is correct
21 Correct 15 ms 3432 KB Output is correct
22 Correct 16 ms 3432 KB Output is correct
23 Correct 15 ms 3320 KB Output is correct
24 Correct 18 ms 3416 KB Output is correct
25 Correct 15 ms 3412 KB Output is correct
26 Correct 19 ms 3296 KB Output is correct
27 Correct 16 ms 3412 KB Output is correct
28 Correct 16 ms 3412 KB Output is correct
29 Correct 15 ms 3412 KB Output is correct
30 Correct 15 ms 3412 KB Output is correct
31 Correct 14 ms 3412 KB Output is correct
32 Correct 17 ms 3412 KB Output is correct
33 Correct 14 ms 3388 KB Output is correct
34 Correct 15 ms 3412 KB Output is correct
35 Correct 15 ms 3328 KB Output is correct
36 Correct 18 ms 3432 KB Output is correct
37 Correct 16 ms 3408 KB Output is correct
38 Correct 16 ms 3356 KB Output is correct
39 Correct 16 ms 3412 KB Output is correct
40 Correct 12 ms 3368 KB Output is correct
41 Correct 12 ms 3312 KB Output is correct
42 Correct 12 ms 3412 KB Output is correct
43 Correct 12 ms 3412 KB Output is correct
44 Correct 12 ms 3412 KB Output is correct
45 Correct 13 ms 3424 KB Output is correct
46 Correct 12 ms 3344 KB Output is correct
47 Correct 12 ms 3332 KB Output is correct
48 Correct 13 ms 3412 KB Output is correct
49 Correct 12 ms 3408 KB Output is correct
50 Execution timed out 1099 ms 102344 KB Time limit exceeded
51 Halted 0 ms 0 KB -