Submission #944503

#	Time	Username	Problem	Language	Result	Execution time	Memory
944503		rainboy	입력숫자 (KOI13_mystery)	C11	100 / 100	1 ms	748 KiB

mystery

#include <stdio.h>
#include <string.h>

#define N	30

int n;

int ds[N], rr[N]; char marked[N];

int find(int i) {
	return ds[i] < 0 ? i : (ds[i] = find(ds[i]));
}

void join(int i, int j) {
	i = find(i);
	j = find(j);
	if (i == j)
		return;
	if (ds[i] > ds[j])
		ds[i] = j;
	else {
		if (ds[i] == ds[j])
			ds[i]--;
		ds[j] = i, rr[i] = rr[j];
	}
}

int next(int i) {
	return !marked[i] ? i : (rr[find(i)] + 1) % n;
}

void mark(int i) {
	marked[i] = 1;
	if (marked[(i - 1 + n) % n])
		join((i - 1 + n) % n, i);
	if (marked[(i + 1) % n])
		join(i, (i + 1) % n);
}

int main() {
	static int aa[N];
	int h, i;

	scanf("%d", &n);
	memset(ds, -1, n * sizeof *ds);
	for (i = 0; i < n; i++)
		rr[i] = i;
	i = 0;
	for (h = 0; h < n; h++) {
		i = next(i);
		scanf("%d", &aa[i]);
		mark(i);
		i = (i + aa[i]) % n;
	}
	printf("%d\n", n);
	for (i = 0; i < n; i++)
		printf("%d ", aa[i]);
	printf("\n");
	return 0;
}

Compilation message (stderr)

mystery.c: In function 'main':
mystery.c:44:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   44 |  scanf("%d", &n);
      |  ^~~~~~~~~~~~~~~
mystery.c:51:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   51 |   scanf("%d", &aa[i]);
      |   ^~~~~~~~~~~~~~~~~~~

• Subtask 1: 15 / 15
• Subtask 2: 21 / 21
• Subtask 3: 29 / 29
• Subtask 4: 35 / 35