oj.uz

Submission #739879

# Submission time Handle Problem Language Result Execution time Memory
739879 2023-05-11T13:50:07 Z MODDI Feast (NOI19_feast) C++14
63 / 100
 127 ms 63736 KB 
#include <bits/stdc++.h>
using namespace std;
#define pb push_back
#define mp make_pair
typedef long long ll;
typedef pair<long long, long long> pll;
typedef pair<int,int> pii;
typedef vector<long long> vl;
typedef vector<int> vi;
int n, k;
vl arr;
ll dp[2010][2010][2];
ll f(int at, int segments, int taken){
	if(at >= n)
		return 0;
	if(segments > k)
		return 0;
	if(dp[at][segments][taken] != -1)
		return dp[at][segments][taken];
		
	ll best = 0;
	best = max(best, arr[at] + f(at + 1, segments, 1));
	if(taken == 0)
		best = max(best, f(at + 1, segments, 0));
	if(segments + 1 < k && taken == 1)
		best = max(best, f(at + 1, segments + 1, 0));
	return dp[at][segments][taken] = best;
}
int main(){
	cin>>n>>k;
	arr.resize(n);
	int cnt = 0;
	for(int i = 0; i < n; i++){
		cin>>arr[i];
		if(arr[i] < 0)	cnt++;
	}
	if(cnt == 0){
		ll ans = 0;
		for(int i = 0; i < n; i++)	ans += arr[i];
		
		cout<<ans<<endl;
	}
	else if(cnt == 1){
		ll left = 0, right = 0, flag = 0, pos = -1;
		for(int i = 0; i < n; i++){
			if(arr[i] < 0){
				pos = i;
				flag = 1;
			}
			else if(flag == 0)	left += arr[i];
			else right += arr[i];
		}
		cout<<max(max(left, right), left + right + arr[pos]);
	}
	else if(k == 1){
		ll ans = 0, help = 0;
		for(int i = 0; i < n; i++){
			help += arr[i];
			if(ans < help)	ans = help;
			if(help < 0)	help = 0;
		}
		cout<<ans<<endl;
	}
	else{
		memset(dp, -1, sizeof dp);
		cout<<f(0, 0, 0)<<endl;
	}
	return 0;
}

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 98 ms 2576 KB Output is correct
2 Correct 109 ms 2612 KB Output is correct
3 Correct 102 ms 2644 KB Output is correct
4 Correct 104 ms 2644 KB Output is correct
5 Correct 104 ms 2620 KB Output is correct
6 Correct 101 ms 2636 KB Output is correct
7 Correct 98 ms 2572 KB Output is correct
8 Correct 102 ms 2620 KB Output is correct
9 Correct 101 ms 2580 KB Output is correct
10 Correct 102 ms 2516 KB Output is correct

Subtask #2
0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 56 ms 2592 KB Output is correct
2 Correct 56 ms 2644 KB Output is correct
3 Correct 70 ms 2584 KB Output is correct
4 Incorrect 71 ms 2516 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #3
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 110 ms 2620 KB Output is correct
2 Correct 109 ms 2584 KB Output is correct
3 Correct 114 ms 2616 KB Output is correct
4 Correct 111 ms 2584 KB Output is correct
5 Correct 114 ms 2516 KB Output is correct
6 Correct 127 ms 2644 KB Output is correct
7 Correct 113 ms 2644 KB Output is correct
8 Correct 108 ms 2612 KB Output is correct
9 Correct 111 ms 2644 KB Output is correct
10 Correct 111 ms 2644 KB Output is correct

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 26 ms 63480 KB Output is correct
3 Correct 27 ms 63516 KB Output is correct
4 Correct 24 ms 63512 KB Output is correct
5 Correct 24 ms 63536 KB Output is correct
6 Correct 24 ms 63444 KB Output is correct
7 Correct 24 ms 63444 KB Output is correct
8 Correct 24 ms 63444 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 24 ms 63488 KB Output is correct

Subtask #5
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 26 ms 63480 KB Output is correct
3 Correct 27 ms 63516 KB Output is correct
4 Correct 24 ms 63512 KB Output is correct
5 Correct 24 ms 63536 KB Output is correct
6 Correct 24 ms 63444 KB Output is correct
7 Correct 24 ms 63444 KB Output is correct
8 Correct 24 ms 63444 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 24 ms 63488 KB Output is correct
11 Correct 27 ms 63464 KB Output is correct
12 Correct 25 ms 63444 KB Output is correct
13 Correct 26 ms 63572 KB Output is correct
14 Correct 25 ms 63516 KB Output is correct
15 Correct 25 ms 63564 KB Output is correct
16 Correct 25 ms 63444 KB Output is correct
17 Correct 26 ms 63448 KB Output is correct
18 Correct 26 ms 63572 KB Output is correct
19 Correct 26 ms 63572 KB Output is correct
20 Correct 26 ms 63568 KB Output is correct

Subtask #6
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 26 ms 63480 KB Output is correct
3 Correct 27 ms 63516 KB Output is correct
4 Correct 24 ms 63512 KB Output is correct
5 Correct 24 ms 63536 KB Output is correct
6 Correct 24 ms 63444 KB Output is correct
7 Correct 24 ms 63444 KB Output is correct
8 Correct 24 ms 63444 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 24 ms 63488 KB Output is correct
11 Correct 27 ms 63464 KB Output is correct
12 Correct 25 ms 63444 KB Output is correct
13 Correct 26 ms 63572 KB Output is correct
14 Correct 25 ms 63516 KB Output is correct
15 Correct 25 ms 63564 KB Output is correct
16 Correct 25 ms 63444 KB Output is correct
17 Correct 26 ms 63448 KB Output is correct
18 Correct 26 ms 63572 KB Output is correct
19 Correct 26 ms 63572 KB Output is correct
20 Correct 26 ms 63568 KB Output is correct
21 Correct 36 ms 63700 KB Output is correct
22 Correct 61 ms 63700 KB Output is correct
23 Correct 49 ms 63736 KB Output is correct
24 Correct 38 ms 63700 KB Output is correct
25 Correct 45 ms 63580 KB Output is correct
26 Correct 35 ms 63592 KB Output is correct
27 Correct 42 ms 63696 KB Output is correct
28 Correct 29 ms 63632 KB Output is correct
29 Correct 27 ms 63600 KB Output is correct
30 Correct 25 ms 63672 KB Output is correct

Subtask #7
0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 98 ms 2576 KB Output is correct
2 Correct 109 ms 2612 KB Output is correct
3 Correct 102 ms 2644 KB Output is correct
4 Correct 104 ms 2644 KB Output is correct
5 Correct 104 ms 2620 KB Output is correct
6 Correct 101 ms 2636 KB Output is correct
7 Correct 98 ms 2572 KB Output is correct
8 Correct 102 ms 2620 KB Output is correct
9 Correct 101 ms 2580 KB Output is correct
10 Correct 102 ms 2516 KB Output is correct
11 Correct 56 ms 2592 KB Output is correct
12 Correct 56 ms 2644 KB Output is correct
13 Correct 70 ms 2584 KB Output is correct
14 Incorrect 71 ms 2516 KB Output isn't correct
15 Halted 0 ms 0 KB -