oj.uz

Submission #446878

# Submission time Handle Problem Language Result Execution time Memory
446878 2021-07-23T16:30:16 Z rainboy Pohlepko (COCI16_pohlepko) C
80 / 80
 233 ms 23672 KB 
#include <stdio.h>
#include <string.h>

#define N	2000
#define M	2000
#define A	26

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

void sort(int *aa, int *ii, int *jj, int n, int k) {
	static int kk[N + 1];
	int h, i, j, a;

	memset(kk, 0, (n + 1) * sizeof *kk);
	for (h = 0; h < k; h++) {
		i = ii[h];
		kk[aa[i] + 1]++;
	}
	for (a = 1; a <= n; a++)
		kk[a] += kk[a - 1];
	for (h = 0; h < k; h++) {
		j = ii[h];
		jj[kk[aa[j]]++] = j;
	}
}

int main() {
	static char cc[N][M + 1];
	static int aa[N][M], xx[N], yy[N], ii[N], jj[N];
	int n, m, h, i, j, k, ij;

	scanf("%d%d", &n, &m);
	for (i = 0; i < n; i++)
		scanf("%s", cc[i]);
	for (ij = (n - 1 + m - 1) - 1; ij >= 0; ij--) {
		k = 0;
		for (i = max(ij - (m - 1), 0), j = ij - i; i < n && j >= 0; i++, j--) {
			ii[k++] = i, xx[i] = cc[i][j] - 'a';
			yy[i] = (i + 1 < n && (j + 1 == m || aa[i + 1][j] < aa[i][j + 1])) ? aa[i + 1][j] : aa[i][j + 1];
		}
		sort(yy, ii, jj, n, k), sort(xx, jj, ii, A, k);
		for (h = 0; h < k; h++) {
			i = ii[h], j = ij - i;
			aa[i][j] = h;
		}
	}
	i = 0, j = 0;
	while (i + 1 < n || j + 1 < m) {
		printf("%c", cc[i][j]);
		if (i + 1 < n && (j + 1 == m || aa[i + 1][j] < aa[i][j + 1]))
			i++;
		else
			j++;
	}
	printf("%c\n", cc[i][j]);
	return 0;
}

Compilation message

pohlepko.c: In function 'main':
pohlepko.c:32:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   32 |  scanf("%d%d", &n, &m);
      |  ^~~~~~~~~~~~~~~~~~~~~
pohlepko.c:34:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   34 |   scanf("%s", cc[i]);
      |   ^~~~~~~~~~~~~~~~~~

Subtask #1
80.0 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 3 ms 3244 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 460 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 13 ms 3524 KB Output is correct
7 Correct 71 ms 14676 KB Output is correct
8 Correct 231 ms 23668 KB Output is correct
9 Correct 1 ms 844 KB Output is correct
10 Correct 4 ms 1836 KB Output is correct
11 Correct 6 ms 1516 KB Output is correct
12 Correct 20 ms 7880 KB Output is correct
13 Correct 26 ms 13188 KB Output is correct
14 Correct 233 ms 23672 KB Output is correct
15 Correct 1 ms 972 KB Output is correct
16 Correct 101 ms 16460 KB Output is correct