Submission #48489

#	Time	Username	Problem	Language	Result	Execution time	Memory
48489		zadrga	Split the sequence (APIO14_sequence)	C++14	50 / 100	410 ms	10720 KiB

sequence

#include <bits/stdc++.h>

using namespace std;

#define pb push_back
#define mp make_pair
#define fi first
#define se second
#define INF (1LL << 55)
#define MOD (1000 * 1000 * 1000 + 7)
#define maxn 1111
#define maxk 211

typedef long long ll;
typedef long double ld;
typedef pair<int, int> pii;

ll dp[maxn][maxn], pre[maxn], arr[maxn];
int from[maxn][maxk];

ll sum(int i, int j){
	if(i > j)
		return 0LL;

	return pre[j] - pre[i - 1];
}

int main(){
	int n, k;
	scanf("%d%d", &n, &k);
	for(int i = 1; i <= n; i++){
		scanf("%lld", arr + i);
		pre[i] = pre[i - 1] + arr[i];
	}

	for(int i = 0; i <= n; i++)
		for(int j = 0; j <= k; j++)
			dp[i][j] = -INF;

	for(int i = 1; i <= n - 1; i++)
		dp[i][1] = sum(1, i) * sum(i + 1, n);

	for(int j = 2; j <= k; j++){
		for(int i = j; i <= n - 1; i++){
	//		cout << "dp " << i << "  "<< j << ": \n";
	//		cout << dp[i][j] << endl;
			for(int z = 1; z < i; z++){

	//			cout << "vrednost  " << z <<":  " <<sum(i + 1, n)  << "  " << (sum(1, i) - sum(1, z)) << "  " <<dp[z][j - 1] << endl;
				if(dp[i][j] < sum(i + 1, n) * (sum(1, i) - sum(1, z)) + dp[z][j - 1]){
	//				cout << dp[i][j] << "  " << z << endl;
					dp[i][j] = sum(i + 1, n) * (sum(1, i) - sum(1, z)) + dp[z][j - 1];
					from[i][j] = z;
				}
			}
		//		cout << dp[i][j] << endl << endl;
		}
	}

/*	for(int i = 0; i <= k; i++){
		for(int j = 0; j <= n; j++)
			printf("%d ", from[j][i]);
		printf("\n");
	}  */


	int ans = 0;
	for(int i = 1; i <= n - 1; i++){
		if(dp[i][k] > dp[ans][k])
			ans = i;
	}

	printf("%lld\n", dp[ans][k]);
	for(int i = k; i >= 1; i--){
		printf("%d ", ans);
		ans = from[ans][i];
	}

	return 0;
}

Compilation message (stderr)

sequence.cpp: In function 'int main()':
sequence.cpp:30:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d", &n, &k);
  ~~~~~^~~~~~~~~~~~~~~~
sequence.cpp:32:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%lld", arr + i);
   ~~~~~^~~~~~~~~~~~~~~~~

• Subtask 1: 11 / 11
• Subtask 2: 11 / 11
• Subtask 3: 11 / 11
• Subtask 4: 17 / 17
• Subtask 5: 0 / 21
• Subtask 6: 0 / 29