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Submission #848144

# Submission time Handle Problem Language Result Execution time Memory
848144 2023-09-11T12:38:08 Z asd12343 Feast (NOI19_feast) C++14
0 / 100
 26 ms 8952 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 (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[n][k];
    }
    return 0;
}

Compilation message

feast.cpp: In function 'int main()':
feast.cpp:30:10: warning: variable 'flag' set but not used [-Wunused-but-set-variable]
   30 |     bool flag = false;
      |          ^~~~

Subtask #1
0 / 4.0

# Verdict Execution time Memory Grader output
1 Incorrect 24 ms 8952 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 8.0

# Verdict Execution time Memory Grader output
1 Incorrect 15 ms 8792 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 18.0

# Verdict Execution time Memory Grader output
1 Incorrect 26 ms 8792 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 2392 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 11.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 2392 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 2392 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 29.0

# Verdict Execution time Memory Grader output
1 Incorrect 24 ms 8952 KB Output isn't correct
2 Halted 0 ms 0 KB -