97 lines
2.6 KiB
Plaintext
97 lines
2.6 KiB
Plaintext
{
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"cells": [
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{
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"cell_type": "markdown",
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"id": "266f39d0",
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"metadata": {},
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"source": [
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"# [Names Scores](https://projecteuler.net/problem=22)\n",
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"\n",
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"First, let's read the names into a list. We'll also strip the quotes around each name and sort them."
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]
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},
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{
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"cell_type": "code",
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"execution_count": 1,
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"id": "2f23e8ed",
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"metadata": {},
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"outputs": [],
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"source": [
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"with open(\"txt/0022_names.txt\") as f:\n",
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" names = f.read().split(',')\n",
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" \n",
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"for (i, name) in enumerate(names):\n",
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" names[i] = name.strip('\"')\n",
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" \n",
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"names.sort()"
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]
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},
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{
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"cell_type": "markdown",
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"id": "947bb620",
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"metadata": {},
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"source": [
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"The [`ord` function](https://docs.python.org/3/library/functions.html) returns the [Unicode](https://en.wikipedia.org/wiki/Unicode) code point of the provided character. Conveniently, the code point for `A` is 65, `B` is 66, and so on, so we can just subtract 64 to get an (uppercase) letter's number value. (These code points were chosen to be the same as [ASCII's](https://en.wikipedia.org/wiki/ASCII) for backward compatibility. [Here's a short but informative video on Unicode and UTF-8](https://www.youtube.com/watch?v=MijmeoH9LT4).)\n",
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"\n",
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"Add up these number values for a name, multiply by the position in the list, and sum up."
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]
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},
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{
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"cell_type": "code",
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"execution_count": 2,
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"id": "9966edb4",
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"metadata": {},
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"outputs": [
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{
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"data": {
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"text/plain": [
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"871198282"
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]
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},
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"execution_count": 2,
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"metadata": {},
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"output_type": "execute_result"
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}
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],
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"source": [
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"def name_score(pos, name):\n",
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" return pos * sum(ord(c) - 64 for c in name)\n",
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"\n",
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"\n",
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"sum(name_score(i, name) for (i, name) in enumerate(names, start=1))"
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]
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},
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{
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"cell_type": "markdown",
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"id": "7c61f808",
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"metadata": {},
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"source": [
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"#### Copyright (C) 2025 filifa\n",
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"\n",
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"This work is licensed under the [Creative Commons Attribution-ShareAlike 4.0 International license](https://creativecommons.org/licenses/by-sa/4.0/) and the [BSD Zero Clause license](https://spdx.org/licenses/0BSD.html)."
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]
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}
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],
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"metadata": {
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"kernelspec": {
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"display_name": "SageMath 9.5",
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"language": "sage",
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"name": "sagemath"
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},
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"language_info": {
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"codemirror_mode": {
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"name": "ipython",
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"version": 3
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},
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"file_extension": ".py",
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"mimetype": "text/x-python",
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"name": "python",
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"nbconvert_exporter": "python",
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"pygments_lexer": "ipython3",
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"version": "3.11.2"
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}
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},
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"nbformat": 4,
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"nbformat_minor": 5
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}
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