oj.uz

Submission #739878

# Submission time Handle Problem Language Result Execution time Memory
739878 2023-05-11T13:49:31 Z MODDI Feast (NOI19_feast) C++14
63 / 100
 120 ms 63716 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;
vi 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 101 ms 1436 KB Output is correct
2 Correct 106 ms 1456 KB Output is correct
3 Correct 111 ms 1472 KB Output is correct
4 Correct 119 ms 1460 KB Output is correct
5 Correct 104 ms 1364 KB Output is correct
6 Correct 104 ms 1364 KB Output is correct
7 Correct 101 ms 1432 KB Output is correct
8 Correct 102 ms 1456 KB Output is correct
9 Correct 101 ms 1440 KB Output is correct
10 Correct 105 ms 1448 KB Output is correct

Subtask #2
0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 58 ms 1440 KB Output is correct
2 Correct 59 ms 1472 KB Output is correct
3 Correct 56 ms 1444 KB Output is correct
4 Incorrect 65 ms 1452 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 113 ms 1364 KB Output is correct
2 Correct 112 ms 1364 KB Output is correct
3 Correct 112 ms 1364 KB Output is correct
4 Correct 116 ms 1364 KB Output is correct
5 Correct 111 ms 1448 KB Output is correct
6 Correct 114 ms 1484 KB Output is correct
7 Correct 113 ms 1464 KB Output is correct
8 Correct 112 ms 1452 KB Output is correct
9 Correct 120 ms 1464 KB Output is correct
10 Correct 117 ms 1468 KB Output is correct

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 25 ms 63492 KB Output is correct
3 Correct 25 ms 63540 KB Output is correct
4 Correct 27 ms 63432 KB Output is correct
5 Correct 25 ms 63416 KB Output is correct
6 Correct 29 ms 63444 KB Output is correct
7 Correct 29 ms 63500 KB Output is correct
8 Correct 26 ms 63524 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 27 ms 63492 KB Output is correct

Subtask #5
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 25 ms 63492 KB Output is correct
3 Correct 25 ms 63540 KB Output is correct
4 Correct 27 ms 63432 KB Output is correct
5 Correct 25 ms 63416 KB Output is correct
6 Correct 29 ms 63444 KB Output is correct
7 Correct 29 ms 63500 KB Output is correct
8 Correct 26 ms 63524 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 27 ms 63492 KB Output is correct
11 Correct 28 ms 63556 KB Output is correct
12 Correct 25 ms 63548 KB Output is correct
13 Correct 27 ms 63472 KB Output is correct
14 Correct 27 ms 63428 KB Output is correct
15 Correct 25 ms 63444 KB Output is correct
16 Correct 25 ms 63540 KB Output is correct
17 Correct 29 ms 63476 KB Output is correct
18 Correct 25 ms 63496 KB Output is correct
19 Correct 27 ms 63468 KB Output is correct
20 Correct 26 ms 63564 KB Output is correct

Subtask #6
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 25 ms 63492 KB Output is correct
3 Correct 25 ms 63540 KB Output is correct
4 Correct 27 ms 63432 KB Output is correct
5 Correct 25 ms 63416 KB Output is correct
6 Correct 29 ms 63444 KB Output is correct
7 Correct 29 ms 63500 KB Output is correct
8 Correct 26 ms 63524 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 27 ms 63492 KB Output is correct
11 Correct 28 ms 63556 KB Output is correct
12 Correct 25 ms 63548 KB Output is correct
13 Correct 27 ms 63472 KB Output is correct
14 Correct 27 ms 63428 KB Output is correct
15 Correct 25 ms 63444 KB Output is correct
16 Correct 25 ms 63540 KB Output is correct
17 Correct 29 ms 63476 KB Output is correct
18 Correct 25 ms 63496 KB Output is correct
19 Correct 27 ms 63468 KB Output is correct
20 Correct 26 ms 63564 KB Output is correct
21 Correct 36 ms 63692 KB Output is correct
22 Correct 60 ms 63684 KB Output is correct
23 Correct 47 ms 63700 KB Output is correct
24 Correct 39 ms 63704 KB Output is correct
25 Correct 44 ms 63588 KB Output is correct
26 Correct 40 ms 63608 KB Output is correct
27 Correct 43 ms 63660 KB Output is correct
28 Correct 29 ms 63716 KB Output is correct
29 Correct 29 ms 63680 KB Output is correct
30 Correct 27 ms 63700 KB Output is correct

Subtask #7
0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 101 ms 1436 KB Output is correct
2 Correct 106 ms 1456 KB Output is correct
3 Correct 111 ms 1472 KB Output is correct
4 Correct 119 ms 1460 KB Output is correct
5 Correct 104 ms 1364 KB Output is correct
6 Correct 104 ms 1364 KB Output is correct
7 Correct 101 ms 1432 KB Output is correct
8 Correct 102 ms 1456 KB Output is correct
9 Correct 101 ms 1440 KB Output is correct
10 Correct 105 ms 1448 KB Output is correct
11 Correct 58 ms 1440 KB Output is correct
12 Correct 59 ms 1472 KB Output is correct
13 Correct 56 ms 1444 KB Output is correct
14 Incorrect 65 ms 1452 KB Output isn't correct
15 Halted 0 ms 0 KB -