Submission #823206

#	Time	Username	Problem	Language	Result	Execution time	Memory
823206		rainboy	Real Mountains (CCO23_day1problem2)	C11	10 / 25	5039 ms	6976 KiB

Main

#include <stdio.h>

#define N	1000000
#define INF	0x3f3f3f3f
#define MD	1000003

int min(int a, int b) { return a < b ? a : b; }

int main() {
	static int aa[N];
	int n, i, l, r, a, k, bll, blr, brr, brl, ans;

	scanf("%d", &n);
	for (i = 0; i < n; i++)
		scanf("%d", &aa[i]);
	ans = 0;
	for (a = 1; ; a++) {
		l = 0;
		while (l < n && aa[l] <= a)
			l++;
		if (l == n)
			break;
		r = n - 1;
		while (r >= 0 && aa[r] <= a)
			r--;
		k = 0;
		for (i = l; i <= r; i++)
			if (aa[i] <= a)
				k++;
		if (k > 0) {
			ans = (ans + (long long) (a * 3 + 2) * k) % MD;
			bll = blr = INF;
			for (i = l; i <= r; i++)
				if (aa[i] > a)
					bll = min(bll, aa[i]);
				else {
					while (i <= r) {
						if (aa[i] > a)
							blr = min(blr, aa[i]);
						i++;
					}
					break;
				}
			brr = brl = INF;
			for (i = r; i >= l; i--)
				if (aa[i] > a)
					brr = min(brr, aa[i]);
				else {
					while (i >= l) {
						if (aa[i] > a)
							brl = min(brl, aa[i]);
						i--;
					}
					break;
				}
			if (k == 1)
				ans = (ans + bll + brr - (a + 1) * 2) % MD;
			else
				ans = (ans + bll + brr + min(blr, brl) - (a + 1) * 3) % MD;
		}
	}
	printf("%d\n", ans);
	return 0;
}

Compilation message (stderr)

Main.c: In function 'main':
Main.c:13:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   13 |  scanf("%d", &n);
      |  ^~~~~~~~~~~~~~~
Main.c:15:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   15 |   scanf("%d", &aa[i]);
      |   ^~~~~~~~~~~~~~~~~~~

• Subtask 1: 3 / 3
• Subtask 2: 3 / 3
• Subtask 3: 0 / 3
• Subtask 4: 0 / 3
• Subtask 5: 4 / 4
• Subtask 6: 0 / 5
• Subtask 7: 0 / 4