110 lines
2.1 KiB
Bash
110 lines
2.1 KiB
Bash
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#!/usr/bin/env bash
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FILE=input
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ITERATIONS=75
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# Get max num size by squaring the largest number
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MAX_NUM_SIZE=0
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while read -r NUM
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do
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if [[ ${#NUM} -gt $MAX_NUM_SIZE ]]
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then
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MAX_NUM_SIZE=${#NUM}
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fi
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done <<< "$( < input tr " " "\n" )"
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(( MAX_NUM_SIZE*=2 ))
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# Just pre-compute a large number of digits
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{
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# Rule 1
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printf "0 1 \n"
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# Rule 2 : If even number of digits, split half half
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for (( i=10 ; i<100; i+=1 ))
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do
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DIGIT_COUNT=${#i}
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HALF=$(( DIGIT_COUNT / 2 ))
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printf "%s %s %s \n" "$i" "$(( 10#${i:0:$HALF} ))" "$(( 10#${i:$HALF} ))"
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done
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for (( i=1000 ; i<10000; i+=1 ))
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do
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DIGIT_COUNT=${#i}
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HALF=$(( DIGIT_COUNT / 2 ))
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printf "%s %s %s \n" "$i" "$(( 10#${i:0:$HALF} ))" "$(( 10#${i:$HALF} ))"
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done
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for (( i=100000 ; i<1000000; i+=1 ))
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do
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DIGIT_COUNT=${#i}
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HALF=$(( DIGIT_COUNT / 2 ))
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printf "%s %s %s \n" "$i" "$(( 10#${i:0:$HALF} ))" "$(( 10#${i:$HALF} ))"
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done
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# Rule 3
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for (( i=1; i<10; i+=1 ))
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do
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printf "%s %s \n" "$i" "$(( i * 2024 ))"
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done
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for (( i=100; i<1000; i+=1 ))
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do
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printf "%s %s \n" "$i" "$(( i * 2024 ))"
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done
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for (( i=10000; i<100000; i+=1 ))
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do
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printf "%s %s \n" "$i" "$(( i * 2024 ))"
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done
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} | sort -n > kv-cache
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printf "Cache built. KV size: %s \n" "$( wc -l kv-cache )"
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# Load cache file
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declare -A KV_CACHE
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while read -r LINE
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do
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KV_CACHE[${LINE%% *}]="${LINE#* }"
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done < kv-cache
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NUM=0
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get_num () {
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NUM=$1
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# Rule 1 : Convert 0 to 1
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if [[ $NUM -eq 0 ]]
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then
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printf "1 \n"
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return
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fi
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# Rule 2 : If even number of digits, split half half
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DIGIT_COUNT=${#NUM}
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if [[ $(( DIGIT_COUNT % 2 )) -eq 0 ]]
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then
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HALF=$(( DIGIT_COUNT / 2 ))
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printf "%s %s " "$(( 10#${NUM:0:$HALF} ))" "$(( 10#${NUM:$HALF} ))"
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return
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fi
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# Rule 3 : Multiply by 2024
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printf "%s \n" "$(( NUM * 2024 ))"
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return
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}
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# Start the loop
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tr " " "\n" < "$FILE" > temp-input
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for (( i=0; i<75; i++ ))
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do
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printf "%s Position %s\n" "$( date )" "$i"
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while read -r NUM
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do
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if [[ -v ${KV_CACHE[$NUM]} ]]
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then
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printf "%s \n" "${KV_CACHE[$NUM]}"
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else
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get_num "$NUM"
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fi
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done < temp-input |
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tr " " "\n" |
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grep -Eo '[0-9]*' |
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sponge temp-input
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done
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printf "Final count: %s\n" "$(wc -l < temp-input)"
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