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Diffstat (limited to '')
| -rw-r--r-- | 2022/day12.awk | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/2022/day12.awk b/2022/day12.awk index 265fad6..314ce87 100644 --- a/2022/day12.awk +++ b/2022/day12.awk @@ -55,4 +55,40 @@ END { delete N[i]; } print N[i]; + delete Q; + delete N; + delete V; + l = 1; + Q[l] = E; + N[l] = 0; + for (i = 1; Q[i]; ++i) { + split(Q[i], a, ","); + x = a[1]; + y = a[2]; + n = N[i]; + if (m[x,y] == 1) break; + if (x > 1 && !V[x-1,y] && m[x-1,y] >= m[x,y]-1) { + V[x-1,y] = 1; + Q[++l] = x-1 "," y; + N[l] = n+1; + } + if (x < w && !V[x+1,y] && m[x+1,y] >= m[x,y]-1) { + V[x+1,y] = 1; + Q[++l] = x+1 "," y; + N[l] = n+1; + } + if (y > 1 && !V[x,y-1] && m[x,y-1] >= m[x,y]-1) { + V[x,y-1] = 1; + Q[++l] = x "," y-1; + N[l] = n+1; + } + if (y < h && !V[x,y+1] && m[x,y+1] >= m[x,y]-1) { + V[x,y+1] = 1; + Q[++l] = x "," y+1; + N[l] = n+1; + } + delete Q[i]; + delete N[i]; + } + print N[i]; } |