Submission #482402

#	Time	Username	Problem	Language	Result	Execution time	Memory
482402		rainboy	Bajka (COCI20_bajka)	C11	70 / 70	1 ms	332 KiB

bajka

#include <stdio.h>

#define N	300
#define M	300
#define INF	0x3f3f3f3f

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

int main() {
	static char aa[N + 1], bb[M + 1];
	static int dp[N], dq[N];
	int n, m, i, j, ans;

	scanf("%d%d%s%s", &n, &m, aa, bb);
	for (j = 0; j < m; j++) {
		if (j > 0) {
			int p;

			for (i = 0, p = -1; i < n; i++)
				if (aa[i] == bb[j - 1]) {
					if (p != -1)
						dp[i] = min(dp[i], dp[p] + i - p);
					p = i;
				}
			for (i = n - 1, p = -1; i >= 0; i--)
				if (aa[i] == bb[j - 1]) {
					if (p != -1)
						dp[i] = min(dp[i], dp[p] + p - i);
					p = i;
				}
			for (i = 0; i < n; i++) {
				dq[i] = min(i == 0 ? INF : dp[i - 1], i + 1 == n ? INF : dp[i + 1]);
				if (dq[i] != INF)
					dq[i]++;
			}
		}
		for (i = 0; i < n; i++)
			dp[i] = aa[i] == bb[j] ? dq[i] : INF;
	}
	ans = INF;
	for (i = 0; i < n; i++)
		ans = min(ans, dp[i]);
	if (ans == INF)
		ans = -1;
	printf("%d\n", ans);
	return 0;
}

Compilation message (stderr)

bajka.c: In function 'main':
bajka.c:14:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   14 |  scanf("%d%d%s%s", &n, &m, aa, bb);
      |  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 20 / 20
• Subtask 2: 50 / 50