Submission #93243

#	Time	Username	Problem	Language	Result	Execution time	Memory
93243		emil_physmath	Split the sequence (APIO14_sequence)	C++17	Compilation error	0 ms	0 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 curk=1; curk<=k; curk++)
	{
		dp[i][0]=0;
		lt[i][0]=-1;
		for (int i=curk; i<n; i++)
		{
			for (int prevSpl=0; prevSpl<i; prevSpl++)
				if (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["<<i<<"]["<<curk<<"] = "<<dp[i][curk]<<'\t';
				cout<<"lt["<<i<<"]["<<curk<<"] = "<<lt[i][curk]<<'\n';
				*/
		}
	}
	cout<<dp[n-1][k]<<'\n';
	int cur=n-1;
	while (k)
	{
		cur=lt[cur][k];
		k--;
		printf("%d ", cur+1);
	}
	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:20:6: error: 'i' was not declared in this scope
   dp[i][0]=0;
      ^
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);
   ~~~~~^~~~~~~~~~~~~