commit 954a9118cde8009233a2f74d97b11a6730b1b4f3
Author: eater <=@eater.me>
Date:   Mon Dec 2 14:42:57 2019 +0100

    Initial commit

diff --git a/day-1/part-1/input b/day-1/part-1/input
new file mode 100644
index 0000000..328b9d8
--- /dev/null
+++ b/day-1/part-1/input
@@ -0,0 +1,100 @@
+56583
+83363
+127502
+138143
+113987
+147407
+111181
+92655
+79802
+64636
+108805
+148885
+51022
+120002
+52283
+53573
+142374
+143523
+121158
+63332
+63203
+142400
+105515
+140150
+89910
+93081
+129752
+86731
+128755
+134756
+131066
+77990
+77081
+85779
+137271
+72889
+117608
+132442
+115294
+59414
+75495
+79459
+107669
+81496
+144432
+69138
+53410
+71199
+141799
+63964
+110945
+102174
+87697
+88838
+93552
+145531
+54602
+65080
+66865
+139693
+98048
+60409
+88384
+138807
+130854
+75997
+130900
+125974
+129123
+93480
+86042
+128187
+74981
+88144
+96629
+148836
+124473
+57616
+93477
+104174
+97407
+123017
+85408
+64862
+85298
+88142
+62182
+128983
+62981
+124580
+56339
+94335
+125521
+121373
+78777
+125132
+94411
+57789
+97384
+79900
diff --git a/day-1/part-1/main.sh b/day-1/part-1/main.sh
new file mode 100755
index 0000000..f963b2f
--- /dev/null
+++ b/day-1/part-1/main.sh
@@ -0,0 +1,11 @@
+#!/usr/bin/env bash
+cd "$(dirname "$0")";
+
+output=0;
+while read nr; do
+    a=$((nr / 3));
+    a=$((a - 2));
+    output=$((a + output));
+done < ./input
+
+echo $output;
diff --git a/day-1/part-2/input b/day-1/part-2/input
new file mode 100644
index 0000000..328b9d8
--- /dev/null
+++ b/day-1/part-2/input
@@ -0,0 +1,100 @@
+56583
+83363
+127502
+138143
+113987
+147407
+111181
+92655
+79802
+64636
+108805
+148885
+51022
+120002
+52283
+53573
+142374
+143523
+121158
+63332
+63203
+142400
+105515
+140150
+89910
+93081
+129752
+86731
+128755
+134756
+131066
+77990
+77081
+85779
+137271
+72889
+117608
+132442
+115294
+59414
+75495
+79459
+107669
+81496
+144432
+69138
+53410
+71199
+141799
+63964
+110945
+102174
+87697
+88838
+93552
+145531
+54602
+65080
+66865
+139693
+98048
+60409
+88384
+138807
+130854
+75997
+130900
+125974
+129123
+93480
+86042
+128187
+74981
+88144
+96629
+148836
+124473
+57616
+93477
+104174
+97407
+123017
+85408
+64862
+85298
+88142
+62182
+128983
+62981
+124580
+56339
+94335
+125521
+121373
+78777
+125132
+94411
+57789
+97384
+79900
diff --git a/day-1/part-2/main.sh b/day-1/part-2/main.sh
new file mode 100755
index 0000000..eaa6e43
--- /dev/null
+++ b/day-1/part-2/main.sh
@@ -0,0 +1,26 @@
+#!/usr/bin/env bash
+cd "$(dirname "$0")";
+
+function calc_requirement() {
+    local input=$1;
+
+    a=$((input / 3));
+    a=$((a - 2));
+
+    if [ "$a" -gt 0 ]; then
+        b=$(calc_requirement "$a");
+        a=$((a + b));
+    else
+        a=0;
+    fi
+
+    echo $a;
+}
+
+output=0;
+while read nr; do
+    a=$(calc_requirement "$nr");
+    output=$((a + output));
+done < ./input
+
+echo $output;
diff --git a/day-2/input b/day-2/input
new file mode 100644
index 0000000..5233427
--- /dev/null
+++ b/day-2/input
@@ -0,0 +1 @@
+1,0,0,3,1,1,2,3,1,3,4,3,1,5,0,3,2,1,10,19,1,6,19,23,1,13,23,27,1,6,27,31,1,31,10,35,1,35,6,39,1,39,13,43,2,10,43,47,1,47,6,51,2,6,51,55,1,5,55,59,2,13,59,63,2,63,9,67,1,5,67,71,2,13,71,75,1,75,5,79,1,10,79,83,2,6,83,87,2,13,87,91,1,9,91,95,1,9,95,99,2,99,9,103,1,5,103,107,2,9,107,111,1,5,111,115,1,115,2,119,1,9,119,0,99,2,0,14,0
diff --git a/day-2/main.sh b/day-2/main.sh
new file mode 100644
index 0000000..c2eb9e5
--- /dev/null
+++ b/day-2/main.sh
@@ -0,0 +1,53 @@
+#!/usr/bin/env bash
+set -e;
+
+cd "$(dirname "$0")";
+
+run_comp() {
+    IFS="," read -r -a ops < ./input;
+
+    i=0;
+    ops[1]=$1;
+    ops[2]=$2;
+
+    while true; do
+        op="${ops[i]}";
+        case "$op" in
+            1|2)
+                inputa="${ops[i+1]}";
+                inputb="${ops[i+2]}";
+                output="${ops[i+3]}";
+                i=$((i + 4));
+                a="${ops[inputa]}"
+                b="${ops[inputb]}"
+                if [ "$op" -eq "1" ]; then
+                    x=$((a + b));
+                else
+                    x=$((a * b));
+                fi
+                ops[output]=$x;
+                ;;
+            99)
+                break;
+                ;;
+            *)
+                echo "Invalid op: $op";
+                exit 1;
+                ;;
+        esac
+    done
+    echo "${ops[0]}";
+}
+
+echo "part 1: ";
+run_comp 12 2;
+echo;
+echo "part 2: ";
+for noun in $(seq 1 99); do
+    for verb in $(seq 1 99); do
+        if [ "$(run_comp $noun $verb)" -eq 19690720 ]; then
+            echo "$((100 * noun + verb))";
+            exit;
+        fi
+    done;
+done;