oj.uz

Submission #889047

# Submission time Handle Problem Language Result Execution time Memory
889047 2023-12-18T17:21:12 Z Hakiers Cigle (COI21_cigle) C++17
20 / 100
 1000 ms 23016 KB 
#include <bits/stdc++.h>
using namespace std;
constexpr int MAXN = 5e3 + 7;
constexpr int oo = 1e9;
int dp[MAXN][MAXN][2];
int d[MAXN];
bool sum[MAXN*MAXN];
int res = 0;
int n;

int compute(int j, int k, int i, bool right){
	vector<int> tmp[2];
	
	for(int z = j; z <= i; z++)
		tmp[(z > k)].push_back(d[z]);
	

	
	reverse(tmp[0].begin(), tmp[0].end());
	
	
	
	int actsum = 0, cnt = 0;
	
	for(int z = 0; z + 1 < tmp[0].size(); z++){
		actsum += tmp[0][z];
		sum[actsum] = 1;
	}
	
	actsum = 0;
	
	for(int z = 0; z + 1 < tmp[1].size(); z++){
		actsum += tmp[1][z];
		if(sum[actsum]) cnt++;
	}
	
	actsum = 0;
	for(int z = 0; z + 1 < tmp[0].size(); z++){
		actsum += tmp[0][z];
		sum[actsum] = 0;
	}
	if(cnt == 0) return -oo;
	//if(cnt > 1) cout << j << " " << k << " " << i << " " << right << " " << cnt << "\n";
	return cnt;
}

void solve(){
	for(int i = 0; i <= n; i++)
		for(int j = 0; j <= n; j++)
			dp[i][j][0] = dp[i][j][1] = -oo;
	
	for(int i = 1; i <= n; i++)
		dp[1][i][0] = 0;
	
	for(int i = 2; i <= n; i++){
		for(int k = i-1; k >= 1; k--){
			for(int j = k; j >= 1; j--){
				dp[k+1][i][0] = max(dp[k+1][i][0], dp[j][k][1] + compute(j, k, i, 0));
				dp[k+1][i][1] = max(dp[k+1][i][1], dp[j][k][0] + compute(j, k, i, 1));
				res = max({res, dp[k+1][i][0], dp[k+1][i][1]});
			}
		}
	}
	
	/*
	for(int i = 1; i <= n; i++){
		for(int k = 1; k <= n; k++){
			for(int j = k-1; j <= n; j++){
				for(int z = j; z < i; z++){
					dp[z+1][i][k] = max(dp[z+1][i][k], dp[j][z][k-1] + compute(j, z, i, (k%2)));
					res = max(res, dp[z+1][i][k]);
				}
			}
		}
	}
	*/
	
}

int main(){
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	cin >> n;
	
	for(int i = 1; i <= n; i++)
		cin >> d[i];
	
	solve();
	cout << res << "\n";
}

Compilation message

cigle.cpp: In function 'int compute(int, int, int, bool)':
cigle.cpp:25:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   25 |  for(int z = 0; z + 1 < tmp[0].size(); z++){
      |                 ~~~~~~^~~~~~~~~~~~~~~
cigle.cpp:32:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   32 |  for(int z = 0; z + 1 < tmp[1].size(); z++){
      |                 ~~~~~~^~~~~~~~~~~~~~~
cigle.cpp:38:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   38 |  for(int z = 0; z + 1 < tmp[0].size(); z++){
      |                 ~~~~~~^~~~~~~~~~~~~~~

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4440 KB Output is correct
2 Correct 1 ms 4444 KB Output is correct
3 Correct 1 ms 4444 KB Output is correct
4 Correct 1 ms 4444 KB Output is correct
5 Correct 1 ms 4444 KB Output is correct
6 Correct 1 ms 4444 KB Output is correct
7 Correct 1 ms 4444 KB Output is correct
8 Correct 1 ms 4600 KB Output is correct
9 Correct 1 ms 4444 KB Output is correct

Subtask #2
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4440 KB Output is correct
2 Correct 1 ms 4444 KB Output is correct
3 Correct 1 ms 4444 KB Output is correct
4 Correct 1 ms 4444 KB Output is correct
5 Correct 1 ms 4444 KB Output is correct
6 Correct 1 ms 4444 KB Output is correct
7 Correct 1 ms 4444 KB Output is correct
8 Correct 1 ms 4600 KB Output is correct
9 Correct 1 ms 4444 KB Output is correct
10 Correct 61 ms 6492 KB Output is correct
11 Correct 64 ms 6600 KB Output is correct
12 Correct 70 ms 6600 KB Output is correct
13 Correct 61 ms 6492 KB Output is correct
14 Correct 63 ms 6488 KB Output is correct
15 Correct 62 ms 6596 KB Output is correct
16 Correct 62 ms 8788 KB Output is correct
17 Correct 62 ms 6492 KB Output is correct
18 Correct 62 ms 6488 KB Output is correct
19 Correct 61 ms 6488 KB Output is correct
20 Correct 62 ms 6644 KB Output is correct

Subtask #3
0 / 13.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1059 ms 23016 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #4
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4440 KB Output is correct
2 Correct 1 ms 4444 KB Output is correct
3 Correct 1 ms 4444 KB Output is correct
4 Correct 1 ms 4444 KB Output is correct
5 Correct 1 ms 4444 KB Output is correct
6 Correct 1 ms 4444 KB Output is correct
7 Correct 1 ms 4444 KB Output is correct
8 Correct 1 ms 4600 KB Output is correct
9 Correct 1 ms 4444 KB Output is correct
10 Correct 61 ms 6492 KB Output is correct
11 Correct 64 ms 6600 KB Output is correct
12 Correct 70 ms 6600 KB Output is correct
13 Correct 61 ms 6492 KB Output is correct
14 Correct 63 ms 6488 KB Output is correct
15 Correct 62 ms 6596 KB Output is correct
16 Correct 62 ms 8788 KB Output is correct
17 Correct 62 ms 6492 KB Output is correct
18 Correct 62 ms 6488 KB Output is correct
19 Correct 61 ms 6488 KB Output is correct
20 Correct 62 ms 6644 KB Output is correct
21 Execution timed out 1059 ms 23016 KB Time limit exceeded
22 Halted 0 ms 0 KB -

Subtask #5
0 / 52.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4440 KB Output is correct
2 Correct 1 ms 4444 KB Output is correct
3 Correct 1 ms 4444 KB Output is correct
4 Correct 1 ms 4444 KB Output is correct
5 Correct 1 ms 4444 KB Output is correct
6 Correct 1 ms 4444 KB Output is correct
7 Correct 1 ms 4444 KB Output is correct
8 Correct 1 ms 4600 KB Output is correct
9 Correct 1 ms 4444 KB Output is correct
10 Correct 61 ms 6492 KB Output is correct
11 Correct 64 ms 6600 KB Output is correct
12 Correct 70 ms 6600 KB Output is correct
13 Correct 61 ms 6492 KB Output is correct
14 Correct 63 ms 6488 KB Output is correct
15 Correct 62 ms 6596 KB Output is correct
16 Correct 62 ms 8788 KB Output is correct
17 Correct 62 ms 6492 KB Output is correct
18 Correct 62 ms 6488 KB Output is correct
19 Correct 61 ms 6488 KB Output is correct
20 Correct 62 ms 6644 KB Output is correct
21 Execution timed out 1059 ms 23016 KB Time limit exceeded
22 Halted 0 ms 0 KB -