Submission #493277

#	Time	Username	Problem	Language	Result	Execution time	Memory
493277		rainboy	Cigle (COI21_cigle)	C11	48 / 100	1091 ms	67240 KiB

cigle

#include <stdio.h>

#define N	5000

int max(int a, int b) { return a > b ? a : b; }

int main() {
	static int aa[N + 1], dp[N + 1][N + 1];
	int n, i, j, k, l, x, ans;

	scanf("%d", &n);
	for (i = 1; i <= n; i++) {
		scanf("%d", &aa[i]);
		aa[i] += aa[i - 1];
	}
	for (i = 1; i <= n; i++)
		dp[0][i] = 0;
	for (i = 0; i <= n; i++)
		for (j = i + 1; j <= n; j++)
			for (k = j + 1, l = j - 1, x = dp[i][j]; k <= n; k++) {
				dp[j][k] = max(dp[j][k], x);
				while (l >= 0 && aa[k] + aa[l] > aa[j] * 2)
					l--;
				if (l > i && aa[k] + aa[l] == aa[j] * 2)
					x++;
			}
	ans = 0;
	for (i = 0; i < n; i++)
		ans = max(ans, dp[i][n]);
	printf("%d\n", ans);
	return 0;
}

Compilation message (stderr)

cigle.c: In function 'main':
cigle.c:11:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   11 |  scanf("%d", &n);
      |  ^~~~~~~~~~~~~~~
cigle.c:13:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   13 |   scanf("%d", &aa[i]);
      |   ^~~~~~~~~~~~~~~~~~~

• Subtask 1: 9 / 9
• Subtask 2: 11 / 11
• Subtask 3: 13 / 13
• Subtask 4: 15 / 15
• Subtask 5: 0 / 52