35 lines
755 B
C
35 lines
755 B
C
#include <stdio.h>
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#include <stdlib.h>
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#define valid(i, j) 0 <= i && i < m && 0 <= j && j < n && !s[i][j]
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int main(int c, char **v)
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{
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int i, j, m = 0, n = 0;
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/* default size: 5 */
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if (c >= 2) m = atoi(v[1]);
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if (c >= 3) n = atoi(v[2]);
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if (m <= 0) m = 5;
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if (n <= 0) n = m;
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int **s = calloc(1, sizeof(int *) * m + sizeof(int) * m * n);
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s[0] = (int*)(s + m);
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for (i = 1; i < m; i++) s[i] = s[i - 1] + n;
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int dx = 1, dy = 0, val = 0, t;
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for (i = j = 0; valid(i, j); i += dy, j += dx ) {
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for (; valid(i, j); j += dx, i += dy)
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s[i][j] = ++val;
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j -= dx; i -= dy;
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t = dy; dy = dx; dx = -t;
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}
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for (t = 2; val /= 10; t++);
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for(i = 0; i < m; i++)
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for(j = 0; j < n || !putchar('\n'); j++)
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printf("%*d", t, s[i][j]);
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return 0;
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}
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