Submission #93249

#	Time	Username	Problem	Language	Result	Execution time	Memory
93249		emil_physmath	Split the sequence (APIO14_sequence)	C++17	50 / 100	2048 ms	54320 KiB

sequence

#include <iostream>
#include <stdio.h>
using namespace std;
const int MAXN=100001, MAXK=301;

long long a[MAXN], prefSum[MAXN], dp[MAXN][MAXK];
int lt[MAXN][MAXK];

long long sum(int l, int r);
int main()
{
	int n, k;
	cin>>n>>k;
	for (int i=0; i<n; i++)
		scanf("%lld", a+i);
	prefSum[0]=a[0];
	for (int i=1; i<n; i++) prefSum[i]=prefSum[i-1]+a[i];
	for (int i=0; i<n; i++)
		for (int curk=1; curk<=min(k, i); curk++)
		{
			dp[i][curk]=lt[n-1][curk]=-1;
			for (int prevSpl=0; prevSpl<i; prevSpl++)
				if (curk-1<=prevSpl && dp[prevSpl][curk-1]+sum(0, prevSpl)*sum(prevSpl+1, i)>dp[i][curk])
				{
					dp[i][curk]=dp[prevSpl][curk-1]+sum(0, prevSpl)*sum(prevSpl+1, i);
					lt[i][curk]=prevSpl;
				}
		}
	cout<<dp[n-1][k]<<'\n';
	int cur=n-1;
	int cnt=0;
	while (k)
	{
		cur=lt[cur][k];
		k--;
		printf("%d ", cur+1);
		cnt++;
	}
	cout<<'\n';

	char I;
	cin >> I;
	return 0;
}

long long sum(int l, int r)
{
	return l ? prefSum[r]-prefSum[l-1] : prefSum[r];
}

Compilation message (stderr)

sequence.cpp: In function 'int main()':
sequence.cpp:15:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%lld", a+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