diff --git a/01/example.txt b/01/example.txt
new file mode 100644
index 0000000..53287c7
--- /dev/null
+++ b/01/example.txt
@@ -0,0 +1,10 @@
+L68
+L30
+R48
+L5
+R60
+L55
+L1
+L99
+R14
+L82
diff --git a/01/poop.sh b/01/poop.sh
index 6616ebf..3478b30 100755
--- a/01/poop.sh
+++ b/01/poop.sh
@@ -1,12 +1,35 @@
 #!/bin/env bash
-set -euo pipefail
+set -Eeuo pipefail
 
-trap 'echo "SHIEEEET at line $LINENO" >&2' ERR
+trap 'echo "SHIEEEET at line ${LINENO}" >&2' ERR
 
 # Advent of Code day 01
 
 main() {
-    :
+  dial=50
+  count=0
+
+  while read -r line; do
+      dir="${line:0:1}"
+      num="${line:1}"
+
+      # apply rotation
+      if [[ "$dir" == L ]]; then
+          dial=$(( dial - num ))
+      else
+          dial=$(( dial + num ))
+      fi
+
+      # wrap into 0–99
+      dial=$(( (dial % 100 + 100) % 100 ))
+
+      # count zero hits
+      if (( dial == 0 )); then
+          ((count++))
+      fi
+  done < example.txt
+
+  printf "%d\n" "$count"
 }
 
 main "$@"
diff --git a/13/poop.sh b/13/poop.sh
deleted file mode 100755
index e081ec0..0000000
--- a/13/poop.sh
+++ /dev/null
@@ -1,12 +0,0 @@
-#!/bin/env bash
-set -euo pipefail
-
-trap 'echo "SHIEEEET at line $LINENO" >&2' ERR
-
-# Advent of Code day 13
-
-main() {
-    :
-}
-
-main "$@"
diff --git a/14/poop.sh b/14/poop.sh
deleted file mode 100755
index 05d245f..0000000
--- a/14/poop.sh
+++ /dev/null
@@ -1,12 +0,0 @@
-#!/bin/env bash
-set -euo pipefail
-
-trap 'echo "SHIEEEET at line $LINENO" >&2' ERR
-
-# Advent of Code day 14
-
-main() {
-    :
-}
-
-main "$@"
diff --git a/15/poop.sh b/15/poop.sh
deleted file mode 100755
index ab03569..0000000
--- a/15/poop.sh
+++ /dev/null
@@ -1,12 +0,0 @@
-#!/bin/env bash
-set -euo pipefail
-
-trap 'echo "SHIEEEET at line $LINENO" >&2' ERR
-
-# Advent of Code day 15
-
-main() {
-    :
-}
-
-main "$@"
diff --git a/16/poop.sh b/16/poop.sh
deleted file mode 100755
index c9d75ec..0000000
--- a/16/poop.sh
+++ /dev/null
@@ -1,12 +0,0 @@
-#!/bin/env bash
-set -euo pipefail
-
-trap 'echo "SHIEEEET at line $LINENO" >&2' ERR
-
-# Advent of Code day 16
-
-main() {
-    :
-}
-
-main "$@"
diff --git a/17/poop.sh b/17/poop.sh
deleted file mode 100755
index d1c60ad..0000000
--- a/17/poop.sh
+++ /dev/null
@@ -1,12 +0,0 @@
-#!/bin/env bash
-set -euo pipefail
-
-trap 'echo "SHIEEEET at line $LINENO" >&2' ERR
-
-# Advent of Code day 17
-
-main() {
-    :
-}
-
-main "$@"
diff --git a/18/poop.sh b/18/poop.sh
deleted file mode 100755
index 9417f49..0000000
--- a/18/poop.sh
+++ /dev/null
@@ -1,12 +0,0 @@
-#!/bin/env bash
-set -euo pipefail
-
-trap 'echo "SHIEEEET at line $LINENO" >&2' ERR
-
-# Advent of Code day 18
-
-main() {
-    :
-}
-
-main "$@"
diff --git a/19/poop.sh b/19/poop.sh
deleted file mode 100755
index f076340..0000000
--- a/19/poop.sh
+++ /dev/null
@@ -1,12 +0,0 @@
-#!/bin/env bash
-set -euo pipefail
-
-trap 'echo "SHIEEEET at line $LINENO" >&2' ERR
-
-# Advent of Code day 19
-
-main() {
-    :
-}
-
-main "$@"
diff --git a/20/poop.sh b/20/poop.sh
deleted file mode 100755
index 50b5c3d..0000000
--- a/20/poop.sh
+++ /dev/null
@@ -1,12 +0,0 @@
-#!/bin/env bash
-set -euo pipefail
-
-trap 'echo "SHIEEEET at line $LINENO" >&2' ERR
-
-# Advent of Code day 20
-
-main() {
-    :
-}
-
-main "$@"
diff --git a/21/poop.sh b/21/poop.sh
deleted file mode 100755
index f84ef73..0000000
--- a/21/poop.sh
+++ /dev/null
@@ -1,12 +0,0 @@
-#!/bin/env bash
-set -euo pipefail
-
-trap 'echo "SHIEEEET at line $LINENO" >&2' ERR
-
-# Advent of Code day 21
-
-main() {
-    :
-}
-
-main "$@"
diff --git a/22/poop.sh b/22/poop.sh
deleted file mode 100755
index fae6182..0000000
--- a/22/poop.sh
+++ /dev/null
@@ -1,12 +0,0 @@
-#!/bin/env bash
-set -euo pipefail
-
-trap 'echo "SHIEEEET at line $LINENO" >&2' ERR
-
-# Advent of Code day 22
-
-main() {
-    :
-}
-
-main "$@"
diff --git a/23/poop.sh b/23/poop.sh
deleted file mode 100755
index 23c5620..0000000
--- a/23/poop.sh
+++ /dev/null
@@ -1,12 +0,0 @@
-#!/bin/env bash
-set -euo pipefail
-
-trap 'echo "SHIEEEET at line $LINENO" >&2' ERR
-
-# Advent of Code day 23
-
-main() {
-    :
-}
-
-main "$@"
diff --git a/24/poop.sh b/24/poop.sh
deleted file mode 100755
index 80029f7..0000000
--- a/24/poop.sh
+++ /dev/null
@@ -1,12 +0,0 @@
-#!/bin/env bash
-set -euo pipefail
-
-trap 'echo "SHIEEEET at line $LINENO" >&2' ERR
-
-# Advent of Code day 24
-
-main() {
-    :
-}
-
-main "$@"
diff --git a/25/poop.sh b/25/poop.sh
deleted file mode 100755
index 3481c95..0000000
--- a/25/poop.sh
+++ /dev/null
@@ -1,12 +0,0 @@
-#!/bin/env bash
-set -euo pipefail
-
-trap 'echo "SHIEEEET at line $LINENO" >&2' ERR
-
-# Advent of Code day 25
-
-main() {
-    :
-}
-
-main "$@"
diff --git a/26/poop.sh b/26/poop.sh
deleted file mode 100755
index 1313a67..0000000
--- a/26/poop.sh
+++ /dev/null
@@ -1,12 +0,0 @@
-#!/bin/env bash
-set -euo pipefail
-
-trap 'echo "SHIEEEET at line $LINENO" >&2' ERR
-
-# Advent of Code day 26
-
-main() {
-    :
-}
-
-main "$@"
diff --git a/27/poop.sh b/27/poop.sh
deleted file mode 100755
index 6035306..0000000
--- a/27/poop.sh
+++ /dev/null
@@ -1,12 +0,0 @@
-#!/bin/env bash
-set -euo pipefail
-
-trap 'echo "SHIEEEET at line $LINENO" >&2' ERR
-
-# Advent of Code day 27
-
-main() {
-    :
-}
-
-main "$@"
diff --git a/28/poop.sh b/28/poop.sh
deleted file mode 100755
index 4813cbb..0000000
--- a/28/poop.sh
+++ /dev/null
@@ -1,12 +0,0 @@
-#!/bin/env bash
-set -euo pipefail
-
-trap 'echo "SHIEEEET at line $LINENO" >&2' ERR
-
-# Advent of Code day 28
-
-main() {
-    :
-}
-
-main "$@"
diff --git a/29/poop.sh b/29/poop.sh
deleted file mode 100755
index cbd9767..0000000
--- a/29/poop.sh
+++ /dev/null
@@ -1,12 +0,0 @@
-#!/bin/env bash
-set -euo pipefail
-
-trap 'echo "SHIEEEET at line $LINENO" >&2' ERR
-
-# Advent of Code day 29
-
-main() {
-    :
-}
-
-main "$@"
diff --git a/30/poop.sh b/30/poop.sh
deleted file mode 100755
index 40bea40..0000000
--- a/30/poop.sh
+++ /dev/null
@@ -1,12 +0,0 @@
-#!/bin/env bash
-set -euo pipefail
-
-trap 'echo "SHIEEEET at line $LINENO" >&2' ERR
-
-# Advent of Code day 30
-
-main() {
-    :
-}
-
-main "$@"