Submission #545917

#	Time	Username	Problem	Language	Result	Execution time	Memory
545917		rainboy	Cloud Computing (CEOI18_clo)	C11	100 / 100	579 ms	1196 KiB

clo

#include <stdio.h>

#define N	2000
#define M	2000
#define C	50
#define S	(N * C)
#define INF	0x3f3f3f3f3f3f3f3fLL

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

unsigned int X = 12345;

int rand_() {
	return (X *= 3) >> 1;
}

int cc[N + M], ff[N + M], vv[N + M];

void sort(int *ii, int l, int r) {
	while (l < r) {
		int i = l, j = l, k = r, i_ = ii[l + rand_() % (r - l)], tmp;

		while (j < k) {
			int c = ff[ii[j]] != ff[i_] ? ff[i_] - ff[ii[j]] : ii[j] - i_;

			if (c == 0)
				j++;
			else if (c < 0) {
				tmp = ii[i], ii[i] = ii[j], ii[j] = tmp;
				i++, j++;
			} else {
				k--;
				tmp = ii[j], ii[j] = ii[k], ii[k] = tmp;
			}
		}
		sort(ii, l, i);
		l = k;
	}
}

int main() {
	static int ii[N + M];
	static long long dp[S + 1];
	int n, m, i, s;
	long long ans;

	scanf("%d", &n);
	for (i = 0; i < n; i++)
		scanf("%d%d%d", &cc[i], &ff[i], &vv[i]);
	scanf("%d", &m);
	for (i = n; i < n + m; i++)
		scanf("%d%d%d", &cc[i], &ff[i], &vv[i]);
	for (i = 0; i < n + m; i++)
		ii[i] = i;
	sort(ii, 0, n + m);
	for (s = 1; s <= S; s++)
		dp[s] = -INF;
	dp[0] = 0;
	for (i = 0; i < n + m; i++) {
		int i_ = ii[i];

		if (i_ < n) {
			for (s = S; s >= cc[i_]; s--)
				if (dp[s - cc[i_]] != -INF)
					dp[s] = max(dp[s], dp[s - cc[i_]] - vv[i_]);
		} else {
			for (s = 0; s + cc[i_] <= S; s++)
				if (dp[s + cc[i_]] != -INF)
					dp[s] = max(dp[s], dp[s + cc[i_]] + vv[i_]);
		}
	}
	ans = 0;
	for (s = 0; s <= S; s++)
		ans = max(ans, dp[s]);
	printf("%lld\n", ans);
	return 0;
}

Compilation message (stderr)

clo.c: In function 'main':
clo.c:47:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   47 |  scanf("%d", &n);
      |  ^~~~~~~~~~~~~~~
clo.c:49:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   49 |   scanf("%d%d%d", &cc[i], &ff[i], &vv[i]);
      |   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
clo.c:50:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   50 |  scanf("%d", &m);
      |  ^~~~~~~~~~~~~~~
clo.c:52:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   52 |   scanf("%d%d%d", &cc[i], &ff[i], &vv[i]);
      |   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 18 / 18
• Subtask 2: 18 / 18
• Subtask 3: 18 / 18
• Subtask 4: 18 / 18
• Subtask 5: 18 / 18
• Subtask 6: 10 / 10