Submission #964216

#	Time	Username	Problem	Language	Result	Execution time	Memory
964216		dubabuba	Split the sequence (APIO14_sequence)	C++14	11 / 100	96 ms	756 KiB

sequence

#include <bits/stdc++.h>
using namespace std;
 
template<typename T> void ono_max(T &MAX, T CMP) { if(MAX < CMP) MAX = CMP; }
 
#define int long long
 
const int mxk = 22;
const int mxn = 1010;
const int gay = 1e18;
int dp[mxn][mxk], a[mxn], n;
int ls[mxn][mxk], p[mxn], k;

int kv(int a) { return a * a; }
 
signed main() {
	cin >> n >> k;
	if(n > mxn) return 1;
	for(int i = 1; i <= n; i++) {
		cin >> a[i];
		p[i] = p[i - 1] + a[i];
	}
 
	for(int i = 1; i <= n; i++)
	for(int j = 0; j <= k; j++) {
		dp[i][j] = gay;
		if(j == 0)
			dp[i][j] = p[i] * p[i];
	}
 
	// for(int cur = 2; cur <= n; cur++)
	// for(int las = 1; las < cur; las++) {
	// 	int las_sum = p[cur] - p[las];
 
	// 	for(int j = 0; j < k && dp[las][j] != gay; j++) {
	// 		int CMP = dp[las][j] + las_sum * las_sum;
	// 		if(dp[cur][j + 1] == gay || dp[cur][j + 1] >= CMP) {
	// 			dp[cur][j + 1] = CMP;
	// 			ls[cur][j + 1] = las;
	// 		}
	// 	}
	// }

	for(int i = 2; i <= n; i++)
	for(int j = 1; j <= k; j++)
	for(int t = 1; t < i; t++) {
		if(dp[i][j] > dp[t][j - 1] + kv(p[i] - p[t])) {
			dp[i][j] = dp[t][j - 1] + kv(p[i] - p[t]);
			ls[i][j] = t;
		}
	}

	int t = (p[n] * p[n] - dp[n][k]) / 2;
	cout << t << endl;

	for(int i = k; i >= 0; i--) {
		n = ls[n][i];
		if(n > 0)
			cout << n << ' ';
	}

	return 0;
}

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