From 23ec60cde98942d143bfc952a9936d3e4d6c9237 Mon Sep 17 00:00:00 2001
From: Daniel Heras Quesada <dani.heras@hotmail.com>
Date: Mon, 15 Dec 2025 23:38:55 +0100
Subject: [PATCH] feat(day_11): part A done

---
 README.md                                  |   1 +
 src/__tests__/day_11_test.ts               |  10 +
 src/exercises/assets/day_11_input.txt      | 543 +++++++++++++++++++++
 src/exercises/assets/day_11_test_input.txt |  10 +
 src/exercises/day_11.ts                    |  52 ++
 5 files changed, 616 insertions(+)
 create mode 100644 src/__tests__/day_11_test.ts
 create mode 100644 src/exercises/assets/day_11_input.txt
 create mode 100644 src/exercises/assets/day_11_test_input.txt
 create mode 100644 src/exercises/day_11.ts

diff --git a/README.md b/README.md
index f45d582..7eed949 100644
--- a/README.md
+++ b/README.md
@@ -16,6 +16,7 @@
 |  8  | Playground          |   ⭐   |   ⭐   |
 |  9  | Movie Theater       |   ⭐   |   🌓   |
 |  10 | Factory             |   ⭐   |   ⏱️   |
+|  11 | Reactor             |   ⭐   |        |
 
 ### Symbols
 
diff --git a/src/__tests__/day_11_test.ts b/src/__tests__/day_11_test.ts
new file mode 100644
index 0000000..ed3dbee
--- /dev/null
+++ b/src/__tests__/day_11_test.ts
@@ -0,0 +1,10 @@
+import { assertEquals } from "@std/assert";
+import { count_all_out_paths, read_device_list } from "../exercises/day_11.ts";
+
+Deno.test("Day 11 - A", async () => {
+  const input_list = await read_device_list(
+    "src/exercises/assets/day_11_test_input.txt",
+  );
+  const result = count_all_out_paths(input_list, "you");
+  assertEquals(result, 5);
+});
diff --git a/src/exercises/assets/day_11_input.txt b/src/exercises/assets/day_11_input.txt
new file mode 100644
index 0000000..2c46a6e
--- /dev/null
+++ b/src/exercises/assets/day_11_input.txt
@@ -0,0 +1,543 @@
+pnn: opd
+gyc: elv lvv
+mnx: ivr ibb
+vgu: kzj pqv
+ilm: eej qlx wgv qrg
+zgs: zuw xsc qna ere thp jmf wxk myq oip tey eva ydb izr yhm
+ifm: qlj
+cuj: out
+ocn: bvx hpb jee iad jqj bzm hig abe kng ggh oqo pzp iao hud jpk
+nme: hli
+wfq: ewj
+thc: wzt pol iee ogz
+sig: qlx wgv
+dgw: kgf xlt
+hly: wmu xku
+rbs: odx
+zvp: opd zkx xeu bhx zgs
+cki: ztj you
+itw: nya qyb eae
+onp: exe gsv
+zle: out
+qhv: pmn tut uhu
+ibt: ncx
+pum: ztj you
+tmh: hbx hsh ktr nph dcg
+vyy: krx
+ktr: grm
+ggh: ilm ang bwj
+wtb: rbs aaz
+ugk: fet
+ltn: odx ztj
+oah: out
+xcx: pqv wfq elj
+apt: out
+dac: muz fio pum qyf
+lwa: qfc eqq qoq orb
+hiv: xjx enn sie
+xvu: vze aek tjd wll
+bhx: qna mon voe vxt myq ere jmf wxk ljp yhm zuw tey nha nme thp ydb mfv ozp izr
+lmb: ltn wgp mpp
+ksl: xku wmu grm
+hns: zle nvu
+vmw: bxw
+yfn: qju
+vpl: pok
+kzj: kkj ewj
+mon: ure xhk ahv mty
+xll: vol bdk
+wmo: dca gnt
+miv: hly qhb eru mnw
+ica: msp exg thc
+prk: ssx dca dtc
+hud: psu
+oqo: tyx odi ljw
+nqe: hns
+hlr: lmm ymk xcx
+mwt: cuj apt mtq bqu
+ere: fod dxi
+wex: uhy wvp
+ogp: lhh weu
+qab: out
+exg: pol
+hvq: out
+dlf: skp dmm nci vmw
+oey: out
+mge: edd dmm skp nci
+yhm: mty dnc xhk
+pol: xgp ljd ufv ibt pcj qpe jvv yey uhx
+msp: ogz wzt
+kwv: zlt jlx
+wgp: you
+bzm: bww oby oii
+mqw: elv jhz lvv
+xyv: opd zkx bhx zgs
+vyl: pbz wmy bdk
+nya: hcb fet fsf
+tut: bxw xku sbb wmu grm
+uyz: fay jvm
+zxo: opd zkx bhx xeu
+rfp: ckl nzc msp
+jbf: vlu pss ipe
+thv: xeu
+plf: ibb sgk ivr ibw
+pmq: lex cyo
+opb: qlj
+tlr: fay uey
+uhx: vyy uqc erw
+efr: hiv zhy
+mkm: bha
+sxu: cyo exe gsv lex
+lex: rfp
+eae: hcb isb fet
+xkk: yia mwt mgs
+ywb: qfc qoq orb eqq wjp
+thp: fod dxi
+vcz: djo yqr
+voe: hli ovs yyd
+baa: azd
+oip: ovs
+iao: mqw gyc
+ehf: rdv akw
+vcu: ena
+cvo: zle oah nvu
+gft: mpp
+rrc: oah der
+tgp: out
+pzd: zgi
+myq: ovs lgq hli
+der: out
+xjx: iha tog
+bmq: mjz drr
+dtc: oey rqm
+pyp: zgi unr
+zgi: ztj
+emu: ill xfs qpb
+pfs: gsv exe cyo
+koy: msp ckl
+xml: umi nfp dpz bqi aot
+vfz: qst
+zpe: ifm brt opb
+dpz: fsf isb fet
+zhy: enn xjx
+wvp: lnf umb
+xnb: nfp aot bqi
+uvf: ibb fwe sgk
+fwe: fen yxo
+ljd: pgg gke okt
+lgq: ugk
+qpe: vyy bgp erw
+hgk: mwt
+bzq: pgs esy
+mdz: pum cge qyf muz fio
+vlm: opd bhx zgs
+odx: xfh oyz ehh iuo ord vpl drs eyt xkx baa mfl
+ufv: rho
+fen: yug kmf woh
+zbl: hud szr iao oqo pzp hig abe ggh kng bzm jqj iad jee hpb mcr ipg bvx
+yet: jhz
+lnf: xkk hgk aqi
+wmy: aak qdq
+you: drs plk eph csl wex vld ord vfz idu
+khw: skt ssx dca dtc
+ggt: nqp
+nha: zhy ite
+bpf: zle der nvu oah
+qmu: yva wtb
+pti: ilx xve vjw
+qun: vyy bgp
+tha: aot bqi dpz umi nfp
+txq: xmv zae bcr
+los: hvq nsb
+ucq: yug
+aot: fsf
+ibb: fen ucq
+eva: gnx ijp
+wgf: fet
+uxu: fkw qnc lbd
+qgw: zgs bhx zkx opd
+hdl: jnj hrx
+vze: wzt ogz iee
+wjp: iee pol qju wzt
+kuz: pzd pyp rho zqe
+vxt: hiv ite
+nld: cgq miv
+gke: dve twf
+nfp: isb fsf hcb
+brt: xvu
+ssx: oey njy
+ite: enn sie
+gsv: rfp koy ica
+xbi: bhx zkx opd
+egs: grm wmu sbb xku
+dcg: wmu bxw xku
+qyb: fsf isb hcb
+azd: swd hxc
+eim: ptq wtb yva
+jpk: aow oii oby bww
+hig: yet
+kkj: qab evn twt
+raz: nxx lps nld
+twt: out
+uqc: omz ipk mne
+vlk: gnx hdl mtr
+jlx: dcg ktr hbx
+rdj: jsa kxe nfm
+mne: odx ztj you
+ure: qth
+evn: out
+ofa: zgi
+qlx: xyv xkg jcy thv
+elj: ewj kkj pan
+pbz: vcu aak
+xfy: cgq miv vii
+yva: cki aaz
+skp: sbb wmu grm
+zgr: jbn djo
+ahv: fft
+zmp: rfu pbz wmy vol bdk
+lmm: elj kzj
+ijp: hrx jnj
+eej: xbi xkg xyv jcy thv
+vyz: lwa yyr duu
+ubk: xyg mge ufe
+hbx: bxw sbb wmu grm
+ltq: mwt yia
+xve: vxd cfr gft
+hrx: ehf
+elw: weu iml zuu lhh
+nph: wmu sbb grm xku bxw
+okt: twf mdz dac
+fpe: rho zqe
+lbs: zgr vcz
+qfc: pol iee wzt
+kcc: xmv vrk zae bcr
+dfi: qfc qoq
+war: pmn
+gnx: jnj uxp bmq hrx
+vrm: equ tfg
+grm: ggt myt pmq vyz zpe
+csl: xll
+qdq: qah los ena
+tjy: out
+yjs: wzt qju iee
+tiv: lhh iml weu
+vld: wgb uhy
+wqv: jlx tmh yeh
+rkw: wmu bxw xku
+zae: lrp
+ipe: ymk xdb
+duo: wzt ogz qju
+iml: opd
+tce: xfy lps nxx
+fod: xml xnb tha
+qrg: jcy xbi
+qhb: xku sbb wmu grm
+dde: vol bdk rfu
+qju: pcj pti qvy bjz qun rdj kju cnt huy rbj qpe
+zuu: zkx xeu bhx zgs
+ewj: evn twt tjy
+ejf: brt
+xkx: zap hhw azd
+skt: njy
+kmf: egs
+lhh: zgs xeu bhx zkx
+uqk: nfm qmu jsa eim
+mcr: sig bwj
+duu: qfc qoq wjp
+uey: qhv prl
+dve: pum cge qyf muz
+yqr: prk kvk
+qth: wgf ede pgs
+mfv: rwg umy
+abe: bww oby
+drr: akw
+mpp: ztj odx
+iha: isb
+kvk: skt gnt dtc
+huy: nfm kxe qmu jsa eim
+dmm: bxw xku sbb grm
+mgs: apt cuj
+ptq: aaz cki
+uma: cki rbs
+cyo: ica koy rfp
+yjl: xll vyl
+lrp: wzt qju iee pol ogz
+uvv: ufe dlf
+pss: xcx
+ozp: ite
+xfh: vlu qst
+nzc: ogz iee pol
+nbr: uhu pmn glj
+qrf: zkx opd zgs bhx
+mnw: bxw
+uxp: mjz
+jgp: tsx jaq ekw
+bml: rrc bpf
+idu: uhy
+psu: fkw hqn lbd
+bwj: kyw qlx wgv qrg
+eqq: pol qju
+pmn: grm sbb
+myt: ywb lwa duu
+pqv: kkj
+zkx: efr ydb mfv all izr zuw vlk tey nme thp yhm qna xsc voe vxt oip myq wxk jmf
+tfg: kgf xlt duo
+ovg: isb fsf hcb
+iad: uxu rru
+cfr: mpp
+hqn: nbo pnn zxo
+bjz: vjw xve ncx ilx
+ckl: qju iee ogz
+edd: wmu
+yeh: hbx dcg nph ktr
+djo: kvk khw rby wmo
+sbu: fsf isb fet hcb
+lvv: vlm dzr
+ftk: ifm brt bha
+fft: pgs ede esy ojl
+kgf: iee ogz wzt
+hpb: psu rru uxu
+jvv: okt pgg
+erw: omz
+lbd: snl
+jyh: exg nzc
+snl: zgs xeu zkx
+uuy: nld nxx
+qpb: zgs bhx zkx
+prl: tut
+nbo: zgs xeu opd
+nfm: wtb ptq yva uma
+vjw: gft vxd
+qna: ced dxi
+uwx: der nvu
+oyz: uhy wgb
+wzt: huy jvv qpe fpe qun uqk pcj kju cnt ufv ljd rdj qvy
+pan: evn qab
+swd: ieu nqe
+dzr: opd zkx bhx zgs
+kxe: ptq yva
+jmf: rwg sys
+qpc: vrm hyu nqp
+xyg: dmm edd vmw nci
+eph: hlr ipe vlu pss
+exe: koy rfp jyh ica
+ced: tha
+ehh: vcz zgr
+blb: vrm
+szr: bwj sig
+drg: umi nfp dpz
+weu: bhx xeu zgs zkx
+sfk: qhv nbr
+ffk: isb fsf hcb
+aaz: you odx
+nxx: cgq
+iee: pcj qvy qun ufv bjz fpe
+vlu: ymk vgu xcx xdb
+bvx: tyx odi
+oii: lov xqv
+nci: sbb bxw
+kju: rho pyp ofa pzd
+pzp: yet mqw gyc
+wdd: bcr
+jhz: dzr vlm
+xlt: pol iee ogz
+bdk: qdq aak vcu
+oqz: nxx
+fzw: lhh zuu weu zvp
+krx: odx
+ieu: cvo uwx rrc bpf
+umi: fet fsf hcb
+mfl: zmp
+bww: emu
+rby: dca gnt
+qvy: nfm eim
+rfu: qdq aak
+muz: ztj you odx
+cnt: okt
+fgd: nqp hyu
+jqj: ang bwj
+wmu: ogj bon pfs txq wdd vyz kcc zpe fgd ggt mkm ftk ran sxu myt onp vrb ejf qpc pmq
+stt: xyg
+xkg: zgs bhx zkx opd
+odm: nxx lps nld
+bgp: ipk mne
+qst: xcx ymk vgu xdb lmm
+lov: qgw
+oyo: wqv iva
+uvr: ltn
+ilx: gft lmb uvr vxd
+unr: you ztj odx
+ojl: isb hcb
+vol: qdq
+jcy: opd zkx xeu bhx zgs
+sgk: yxo ucq
+ztj: vld vfz baa eyt xkx eph mfl plk iuo idu ehh vpl xfh oyz csl jbf lbs drs yjl wex
+ncx: uvr lmb gft cfr
+ipg: uxu
+qyf: ztj odx
+ipk: ztj
+mty: bzq qth
+mjz: fvj rdv
+sie: sbu iha tog
+eyt: azd zap
+orb: wzt ogz pol iee
+esy: isb
+iva: yeh tmh
+slh: uhu glj
+xqv: qrf xfs
+mll: yqr djo jbn
+ydb: xhk ure ahv dnc mty
+gnt: rqm
+all: ure mty dnc
+odi: byx hrv tsx jaq ekw
+xeu: ljp vxt myq ere jmf xsc qna izr ydb mfv eva tey vlk nme thp zuw
+tjd: ogz qju wzt
+cge: odx ztj you
+ope: mgs
+xku: pfs txq bon mkm ftk ggt pmq sxu qpc vyz fgd
+ljp: umy rwg
+mtq: out
+rru: fkw qnc lbd
+chu: uwx bpf hns
+vti: eae
+xmv: yjs
+jsy: zvp lhh
+ogj: dfi
+bon: vrm
+ovs: ffk ugk
+hcb: uyz tlr uvv ubk uvf iez mnx raz pzs tce stt uuy oqz anf rkh xud oyo plf trv
+dnc: bzq qth
+hxc: chu glu nqe
+tsx: elw ogp
+akw: hcb
+fay: prl slh
+gcl: bxw wmu sbb
+vrb: lwa ywb yyr
+jvm: qhv war
+vxd: wgp
+nvu: out
+lqw: abe szr hpb hud iad jqj
+eru: sbb
+rkh: kwv wqv
+fdb: bml ieu chu
+rwg: vti
+zqe: rpv unr
+ang: eej kyw
+yxo: yug kmf
+byx: fzw ogp elw tiv
+xgp: gke okt
+hhw: fdb swd
+xsc: hiv zhy
+xdb: elj pqv wfq
+oby: xqv
+xfs: zkx zgs bhx xeu
+aow: lov emu
+qnc: snl ecl
+zlt: dcg nph ktr hbx hsh
+opd: ljp qna xsc mon myq wxk voe oip mfv eva efr izr ozp nha tey
+woh: rkw gcl
+qlj: vze tjd
+hli: ffk ovg
+tey: hdl ijp gnx
+iez: iva wqv
+wgv: thv xyv
+uhu: xku bxw wmu sbb
+trv: uey
+elv: ass
+equ: duo xlt
+efj: wll tjd aek vze
+ufe: nci
+enn: tog iha sbu
+fet: plf tce hxn oyo xud uuy uvf uvv mnx odm tlr uyz
+wgb: zoe
+bxw: onp vrb ejf ogj qpc kcc
+rdv: fsf fet isb
+nqp: tfg equ
+glu: bpf rrc uwx hns cvo
+izr: ahv xhk dnc
+twf: pum
+ass: bhx xeu
+hrv: tiv
+yyd: ffk
+umb: ltq ope xkk
+mtr: bmq uxp
+ecl: opd zkx
+drs: zmp vyl dde
+rho: zgi unr
+cgq: ksl mnw hly
+ena: hvq
+fsf: hxn pzs oyo rkh xud uuy plf
+aek: ogz qju iee
+rqm: out
+jsa: wtb yva uma
+anf: xyg dlf
+rbj: rho pyp pzd ofa
+kng: ljw jgp odi tyx
+pgs: fet
+dja: eae qyb
+lps: cgq
+omz: you ztj
+kyw: xyv xkg jcy
+yyr: qfc qoq eqq
+ede: fsf
+xud: ibw ibb fwe
+hyu: dgw
+pok: swd hxc
+umy: itw dja
+yia: apt mtq cuj tgp
+yug: gcl rkw
+jbn: rby kvk khw prk
+bqi: hcb
+pcj: erw bgp vyy
+aak: qah los ena
+fio: odx
+bcr: yfn yjs
+ivr: fen yxo
+qah: hvq zzs
+iuo: wvp uhy
+vii: hly qhb
+qoq: iee pol wzt
+xhk: qth fft
+uhy: zoe lnf
+pzs: sfk
+pgg: twf mdz dac
+ogz: huy jvv rbj bjz qun uqk ibt kuz kju uhx rdj ljd
+hxn: ufe mge xyg
+ibw: ucq
+dca: oey njy rqm
+isb: plf trv pzs hxn anf oyo rkh xud oqz stt uuy iez uvf ubk uvv raz mnx odm uyz
+wll: wzt qju pol
+glj: bxw wmu
+jnj: ehf drr mjz
+njy: out
+tog: hcb fet fsf
+sys: dja vti
+rpv: ztj odx
+nsb: out
+zuw: mtr ijp gnx
+ymk: wfq pqv elj
+ill: zkx xeu bhx zgs
+ord: zap azd pok
+bha: efj xvu qlj
+zoe: aqi hgk
+bqu: out
+wxk: ovs
+svr: lqw ocn zbl
+jee: yet
+zzs: out
+fvj: hcb fsf fet isb
+ran: ywb dfi lwa
+tyx: ekw tsx byx
+fkw: ecl nbo snl zxo
+plk: mll zgr
+zap: fdb swd
+jaq: fzw
+ljw: tsx hrv ekw
+aqi: yia mwt
+vrk: lrp yjs yfn
+ekw: tiv jsy fzw ogp
+dxi: drg xml
+sbb: wdd kcc vyz fgd zpe ggt mkm ftk sxu ran bon ogj txq qpc pmq myt blb vrb
+hsh: xku bxw wmu sbb grm
+yey: okt
diff --git a/src/exercises/assets/day_11_test_input.txt b/src/exercises/assets/day_11_test_input.txt
new file mode 100644
index 0000000..01e5b43
--- /dev/null
+++ b/src/exercises/assets/day_11_test_input.txt
@@ -0,0 +1,10 @@
+aaa: you hhh
+you: bbb ccc
+bbb: ddd eee
+ccc: ddd eee fff
+ddd: ggg
+eee: out
+fff: out
+ggg: out
+hhh: ccc fff iii
+iii: out
diff --git a/src/exercises/day_11.ts b/src/exercises/day_11.ts
new file mode 100644
index 0000000..094ce0f
--- /dev/null
+++ b/src/exercises/day_11.ts
@@ -0,0 +1,52 @@
+const INIT = "you";
+const END = "out";
+type Device = {
+  name: string;
+  output_list: string[];
+};
+
+export default async function Reactor() {
+  const input_list = await read_device_list(
+    "src/exercises/assets/day_11_input.txt",
+  );
+  const path_count = count_all_out_paths(input_list, "you");
+  console.log(">> The number of paths is: ", path_count);
+}
+
+export function count_all_out_paths(list: Device[], init: string): number {
+  let total = 0;
+  const current_device = list.find((d) => d.name === init);
+
+  // Default exits
+  // NOTE: how to avoid circular connections
+  if (!current_device) {
+    return 0;
+  }
+  if (current_device.output_list.length < 1) {
+    return 0;
+  }
+  if (current_device.output_list.includes(END)) {
+    return 1;
+  }
+
+  current_device.output_list.forEach((output) => {
+    total += count_all_out_paths(list, output);
+  });
+
+  return total;
+}
+
+export async function read_device_list(path: string): Promise<Device[]> {
+  const txt_file = await Deno.readTextFile(path);
+  const raw_device_list = txt_file.split("\n");
+
+  return raw_device_list.filter((d) => !!d).map((device) => {
+    const [name, raw_outputs] = device.split(": ");
+    const output_list = raw_outputs.split(" ");
+    const formatted_device: Device = {
+      name,
+      output_list,
+    };
+    return formatted_device;
+  });
+}