Submission #768805

#	Time	Username	Problem	Language	Result	Execution time	Memory
768805		rainboy	Nice sequence (IZhO18_sequence)	C11	100 / 100	306 ms	29636 KiB

sequence

#include <stdio.h>

#define N	200000
#define M	200000

int gcd(int a, int b) {
	return b == 0 ? a : gcd(b, a % b);
}

int main() {
	int t;

	scanf("%d", &t);
	while (t--) {
		static int pp[N + M];
		int n, m, d, n_, i, p;

		scanf("%d%d", &n, &m), d = gcd(n, m), n_ = m + n - d;
		i = n_, p = 0;
		while (1) {
			i = i >= n ? i - n : i + m;
			if (i == n_)
				break;
			pp[i] = p++;
		}
		for (i = 0; i < n_; i += d)
			pp[i] *= d;
		for (i = 0; i < n_; i++)
			pp[i] = pp[i - i % d] + i % d;
		printf("%d\n", n_ - 1);
		for (i = 1; i < n_; i++)
			printf("%d ", pp[i] - pp[i - 1]);
		printf("\n");
	}
	return 0;
}

Compilation message (stderr)

sequence.c: In function 'main':
sequence.c:13:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   13 |  scanf("%d", &t);
      |  ^~~~~~~~~~~~~~~
sequence.c:18:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   18 |   scanf("%d%d", &n, &m), d = gcd(n, m), n_ = m + n - d;
      |   ^~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 6 / 6
• Subtask 2: 9 / 9
• Subtask 3: 14 / 14
• Subtask 4: 15 / 15
• Subtask 5: 14 / 14
• Subtask 6: 18 / 18
• Subtask 7: 24 / 24