Submission #831786

#	Time	Username	Problem	Language	Result	Execution time	Memory
831786		rainboy	Visiting Singapore (NOI20_visitingsingapore)	C11	100 / 100	439 ms	588 KiB

VisitingSingapore

#include <stdio.h>

#define N	5000
#define M	5000
#define K	1000
#define INF	0x3f3f3f3f

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

int main() {
	static int aa[N], bb[M], ww[K], dp[M + 1][2][2], dq[M + 1][2][2];
	int n, m, k, a, b, i, j, c, u, v, ans;

	scanf("%d%d%d%d%d", &k, &n, &m, &a, &b);
	for (c = 0; c < k; c++)
		scanf("%d", &ww[c]);
	for (i = 0; i < n; i++)
		scanf("%d", &aa[i]), aa[i]--;
	for (j = 0; j < m; j++)
		scanf("%d", &bb[j]), bb[j]--;
	for (j = 0; j <= m; j++)
		for (u = 0; u < 2; u++)
			for (v = 0; v < 2; v++)
				dp[j][u][v] = -INF;
	ans = -INF;
	for (i = 0; i <= n; i++) {
		for (j = 0; j <= m; j++)
			for (u = 0; u < 2; u++)
				for (v = 0; v < 2; v++)
					dq[j][u][v] = -INF;
		dp[0][1][1] = max(dp[0][1][1], 0);
		for (j = 0; j <= m; j++)
			for (u = 0; u < 2; u++)
				for (v = 0; v < 2; v++) {
					int x = dp[j][u][v];

					if (x == -INF)
						continue;
					if (i < n)
						dq[j][0][v] = max(dq[j][0][v], x + (u == 1 ? a : 0) + b);
					if (j < m)
						dp[j + 1][u][0] = max(dp[j + 1][u][0], x + (v == 1 ? a : 0) + b);
					if (i < n && j < m && aa[i] == bb[j])
						dq[j + 1][1][1] = max(dq[j + 1][1][1], x + ww[aa[i]]);
				}
		for (u = 0; u < 2; u++)
			for (v = 0; v < 2; v++)
				ans = max(ans, dp[m][u][v]);
		for (j = 0; j <= m; j++)
			for (u = 0; u < 2; u++)
				for (v = 0; v < 2; v++)
					dp[j][u][v] = dq[j][u][v];
	}
	printf("%d\n", ans);
	return 0;
}

Compilation message (stderr)

VisitingSingapore.c: In function 'main':
VisitingSingapore.c:14:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   14 |  scanf("%d%d%d%d%d", &k, &n, &m, &a, &b);
      |  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
VisitingSingapore.c:16:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   16 |   scanf("%d", &ww[c]);
      |   ^~~~~~~~~~~~~~~~~~~
VisitingSingapore.c:18:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   18 |   scanf("%d", &aa[i]), aa[i]--;
      |   ^~~~~~~~~~~~~~~~~~~
VisitingSingapore.c:20:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   20 |   scanf("%d", &bb[j]), bb[j]--;
      |   ^~~~~~~~~~~~~~~~~~~

• Subtask 1: 4 / 4
• Subtask 2: 6 / 6
• Subtask 3: 12 / 12
• Subtask 4: 7 / 7
• Subtask 5: 8 / 8
• Subtask 6: 13 / 13
• Subtask 7: 50 / 50