oj.uz

답안 #848145

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
848145 2023-09-11T12:39:33 Z asd12343 Feast (NOI19_feast) C++14
45 / 100
 28 ms 48256 KB 
#pragma GCC optimize("Os")
#include <bits/stdc++.h>
using namespace std;
const int MN = 2e6+5;
const int INF = 0x3f3f3f3f;
#define int long long
#define pb push_back
#define p make_pair	
#define fi first
#define se second
#define pii pair<int,int>
#define f(i,a,b) for (int i = a ; i < b ; i++)
#define f1(i,a,b) for (int i = a ; i > b ; i--)
#define f2(i,a,b) for (int i = a ; i <= b ; i++)
#define FILE(X)						\
	freopen(#X ".INP","r",stdin);	\
	freopen(#X ".OUT","w",stdout);

mt19937 rd(chrono::steady_clock::now().time_since_epoch().count());
int random(int l, int r) { return l + rd() % (r - l + 1); }
int a[MN];
int n,k,pos;
int cnt = 0;
int dp[5003][5003];
int pre[MN];
signed main(){
 	ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    //FILE(BLUESKY);
    bool flag = false;
    cin >> n >> k;
    for (int i = 1 ; i <= n ; i++) {
    	cin >> a[i];
    	pre[i] = pre[i-1] + a[i];
    	if (a[i] < 0) flag = true,cnt++, pos = i;
    }	
    if (flag == false) cout << accumulate(a+1,a+n+1,0LL);
    else if (cnt == 1) {
    	if (k == 1) {
    		int sum = 0, sum2 = 0;
    		for (int i = 1 ; i < pos ; i++) sum += a[i];
    		for (int i = pos+1 ; i <= n ; i++) sum2 += a[i];
    		cout << max(sum,sum2) << "\n";
    	}
    	else {
    		cout << accumulate(a+1,a+n+1,0LL) - a[pos];
    	}
    }
    else if (cnt == n) cout << 0;
    else if (n <= 5000) {
    	for (int i = 1; i <= k; ++i){
	        int cur = 0;
	        for (int j = 1; j <= n; ++j) {
	            cur = max(cur, dp[i-1][j] - pre[j]);
	            dp[i][j] = max(dp[i][j-1], cur + pre[j]);
	        }
    	}
    	cout << dp[k][n];
    }
    return 0;
}

Subtask #1
4.0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 22 ms 8788 KB Output is correct
2 Correct 24 ms 8796 KB Output is correct
3 Correct 22 ms 8796 KB Output is correct
4 Correct 22 ms 8800 KB Output is correct
5 Correct 28 ms 8792 KB Output is correct
6 Correct 23 ms 8784 KB Output is correct
7 Correct 22 ms 8784 KB Output is correct
8 Correct 22 ms 8792 KB Output is correct
9 Correct 23 ms 8784 KB Output is correct
10 Correct 22 ms 8784 KB Output is correct

Subtask #2
0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 15 ms 8792 KB Output is correct
2 Incorrect 14 ms 8792 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #3
0 / 18.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 24 ms 8784 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 2648 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 1 ms 2392 KB Output is correct
8 Correct 1 ms 2396 KB Output is correct
9 Correct 1 ms 2392 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct

Subtask #5
11.0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 2648 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 1 ms 2392 KB Output is correct
8 Correct 1 ms 2396 KB Output is correct
9 Correct 1 ms 2392 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 1 ms 2852 KB Output is correct
12 Correct 1 ms 2908 KB Output is correct
13 Correct 1 ms 2648 KB Output is correct
14 Correct 1 ms 2652 KB Output is correct
15 Correct 1 ms 2648 KB Output is correct
16 Correct 1 ms 2648 KB Output is correct
17 Correct 1 ms 2648 KB Output is correct
18 Correct 1 ms 2396 KB Output is correct
19 Correct 1 ms 2392 KB Output is correct
20 Correct 1 ms 2392 KB Output is correct

Subtask #6
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 2648 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 1 ms 2392 KB Output is correct
8 Correct 1 ms 2396 KB Output is correct
9 Correct 1 ms 2392 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 1 ms 2852 KB Output is correct
12 Correct 1 ms 2908 KB Output is correct
13 Correct 1 ms 2648 KB Output is correct
14 Correct 1 ms 2652 KB Output is correct
15 Correct 1 ms 2648 KB Output is correct
16 Correct 1 ms 2648 KB Output is correct
17 Correct 1 ms 2648 KB Output is correct
18 Correct 1 ms 2396 KB Output is correct
19 Correct 1 ms 2392 KB Output is correct
20 Correct 1 ms 2392 KB Output is correct
21 Correct 4 ms 9048 KB Output is correct
22 Correct 21 ms 48256 KB Output is correct
23 Correct 5 ms 12892 KB Output is correct
24 Correct 4 ms 9052 KB Output is correct
25 Correct 5 ms 12120 KB Output is correct
26 Correct 3 ms 6744 KB Output is correct
27 Correct 4 ms 9820 KB Output is correct
28 Correct 1 ms 4956 KB Output is correct
29 Correct 1 ms 4952 KB Output is correct
30 Correct 1 ms 2392 KB Output is correct

Subtask #7
0 / 29.0

# 결과 실행 시간 메모리 Grader output
1 Correct 22 ms 8788 KB Output is correct
2 Correct 24 ms 8796 KB Output is correct
3 Correct 22 ms 8796 KB Output is correct
4 Correct 22 ms 8800 KB Output is correct
5 Correct 28 ms 8792 KB Output is correct
6 Correct 23 ms 8784 KB Output is correct
7 Correct 22 ms 8784 KB Output is correct
8 Correct 22 ms 8792 KB Output is correct
9 Correct 23 ms 8784 KB Output is correct
10 Correct 22 ms 8784 KB Output is correct
11 Correct 15 ms 8792 KB Output is correct
12 Incorrect 14 ms 8792 KB Output isn't correct
13 Halted 0 ms 0 KB -