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Submission #703055

# Submission time Handle Problem Language Result Execution time Memory
703055 2023-02-25T19:38:44 Z rainboy Odd-even (IZhO11_oddeven) C
100 / 100
 6 ms 292 KB 
#include <stdio.h>
#include <string.h>

#define N	111
#define D	10

int main() {
	static char cc[N + 1];
	static int aa[N * 2], bb[N * 2], tt[N * 2];
	int n, h, i, j, r, k;

	scanf("%s", cc), n = strlen(cc);
	for (i = 0; i < n; i++)
		aa[i] = cc[n - 1 - i] - '0';
	for (h = N - 1; h >= 0; h--) {
		for (bb[h] = 1; bb[h] < D; bb[h]++) {
			memset(tt, 0, N * 2 * sizeof *tt);
			for (i = 0; i < N; i++)
				for (j = 0; j < N; j++)
					tt[i + j] += bb[i] * bb[j];
			for (i = 0; i < N; i++)
				tt[i] += bb[i];
			for (i = 0; i < N * 2; i++)
				if (tt[i] >= D)
					tt[i + 1] += tt[i] / D, tt[i] %= D;
			r = 0;
			for (i = N * 2 - 1; i >= 0; i--) {
				r = r * D + tt[i];
				tt[i] = r / 2, r %= 2;
			}
			for (i = N * 2 - 1; i >= 0; i--)
				if (tt[i] != aa[i]) {
					if (tt[i] > aa[i])
						goto out;
					break;
				}
			if (i < 0)
				goto out;
		}
out:
		bb[h]--;
	}
	for (i = 0; i < N; i++)
		aa[i] *= 2;
	for (i = 0; i < N; i++)
		if (aa[i] >= D)
			aa[i] -= D, aa[i + 1]++;
	for (i = 0; i < N; i++)
		aa[i] -= bb[i];
	aa[0]--;
	for (i = 0; i < N; i++)
		if (aa[i] < 0) {
			k = (-aa[i] + 9) / D;
			aa[i] += k * D, aa[i + 1] -= k;
		}
	i = N - 1;
	while (aa[i] == 0)
		i--;
	while (i >= 0)
		printf("%d", aa[i--]);
	printf("\n");
	return 0;
}

Compilation message

oddeven.c: In function 'main':
oddeven.c:12:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   12 |  scanf("%s", cc), n = strlen(cc);
      |  ^~~~~~~~~~~~~~~

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 2 ms 212 KB Output is correct
4 Correct 2 ms 212 KB Output is correct
5 Correct 2 ms 292 KB Output is correct
6 Correct 2 ms 212 KB Output is correct
7 Correct 2 ms 212 KB Output is correct
8 Correct 2 ms 212 KB Output is correct
9 Correct 2 ms 212 KB Output is correct
10 Correct 2 ms 212 KB Output is correct
11 Correct 2 ms 212 KB Output is correct
12 Correct 2 ms 212 KB Output is correct
13 Correct 2 ms 212 KB Output is correct
14 Correct 2 ms 212 KB Output is correct
15 Correct 3 ms 212 KB Output is correct
16 Correct 3 ms 212 KB Output is correct
17 Correct 6 ms 288 KB Output is correct
18 Correct 5 ms 292 KB Output is correct
19 Correct 5 ms 212 KB Output is correct
20 Correct 5 ms 292 KB Output is correct
21 Correct 5 ms 212 KB Output is correct
22 Correct 5 ms 288 KB Output is correct