Submission #910979

#	Time	Username	Problem	Language	Result	Execution time	Memory
910979		daoquanglinh2007	Bigger segments (IZhO19_segments)	C++17	27 / 100	1519 ms	39596 KiB

segments

#include <bits/stdc++.h>
using namespace std;

#define int long long

const int NM = 3000, inf = 1e9+7;

int n, a[NM+5], pref[NM+5], dp[NM+5][NM+5], ans = 0;

signed main(){
	//freopen("SEGMENTS.inp", "r", stdin);
	//freopen("SEGMENTS.ans", "w", stdout);
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);
	
	cin >> n;
	for (int i = 1; i <= n; i++){
		cin >> a[i];
		pref[i] = pref[i-1]+a[i];
	}
	for (int j = 1; j <= n; j++)
		for (int i = 1; i <= j; i++){
			dp[i][j] = (i == 1 ? 1 : -inf);
			for (int k = 1; k <= i-1; k++)
				if (pref[j]-pref[i-1] >= pref[i-1]-pref[k-1]) dp[i][j] = max(dp[i][j], dp[k][i-1]+1);
			if (j == n) ans = max(ans, dp[i][j]);
		}
	cout << ans;
	return 0;
}

• Subtask 1: 13 / 13
• Subtask 2: 14 / 14
• Subtask 3: 0 / 10
• Subtask 4: 0 / 36
• Subtask 5: 0 / 27