Submission #990903

#	Time	Username	Problem	Language	Result	Execution time	Memory
990903		ToniB	Bigger segments (IZhO19_segments)	C++17	37 / 100	1561 ms	7508 KiB

segments

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

#define X first
#define Y second

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

const int N = 5e5 + 2;

int n, a[N];
pii dp[N];
ll pre[N];

ll sum(int i, int j) {
	if (i) return pre[j] - pre[i - 1];
	return pre[j];
}
pii cmp(pii x, pii y) {
	if (x.X == y.X) {
		if (x.Y < y.Y) return x;
		return y;
	}
	if (x.X > y.X) return x;
	return y;
}

int main(){
	cin >> n;
	for (int i = 0; i < n; ++i) cin >> a[i];

	pre[0] = a[0];
	for (int i = 1; i < n; ++i) pre[i] = a[i] + pre[i - 1];

	dp[0] = {1, a[0]};

	for (int i = 1; i < n; ++i) {
		for (int j = 0; j < i; ++j) {
			if (sum(j + 1, i) >= dp[j].Y) {
				dp[i] = cmp(dp[i], {dp[j].X + 1, sum(j + 1, i)});
			}
		}
		dp[i] = cmp(dp[i], {1, pre[i]});
	}

	cout << dp[n - 1].X << "\n";
	
	return 0;
}

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