Submission #760926

#	Time	Username	Problem	Language	Result	Execution time	Memory
760926		usuyus	Cigle (COI21_cigle)	C++17	100 / 100	204 ms	98440 KiB

cigle

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

int main() {
	ios_base::sync_with_stdio(false); cin.tie(nullptr);
	
	int n; cin >> n;

	vector<int> bricks(n);
	for (int &x : bricks) cin >> x;

	vector dp(n+1, vector(n+1, 0));

	for (int i = 0; i <= n; i++) {

		for (int j = 1; j < i; j++) {
			dp[j][i] = max(dp[j][i], dp[j-1][i]);
		}

		int balance = 0;
		int matches = 0;
		int current = 0;

		for (int k = i+1, j = i; k <= n; k++) {

			balance += bricks[k-1];
			while (j > 0 && balance - bricks[j-1] >= 0) {
				balance -= bricks[--j];
			}

			dp[i][k] = max(dp[i][k-1], current);

			if (balance == 0) {
				matches++;
				if (j > 0) current = max(current, dp[j-1][i] + matches);
			}
		}
	}

	cout << dp[n-1][n] << endl;
}

• Subtask 1: 9 / 9
• Subtask 2: 11 / 11
• Subtask 3: 13 / 13
• Subtask 4: 15 / 15
• Subtask 5: 52 / 52