115 lines
2.5 KiB
Text
115 lines
2.5 KiB
Text
{
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"cells": [
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{
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"cell_type": "markdown",
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"id": "92b94045-a058-4b99-bfb6-7709a2a96f1a",
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"metadata": {},
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"source": [
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"# First variant O(n^2)"
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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": null,
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"id": "764a6c5e-5fa8-41be-9ec2-2b097ed29af6",
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"metadata": {
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"tags": []
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},
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"outputs": [],
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"source": [
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"pub fn two_sum(nums: Vec<i32>, target: i32) -> Vec<i32> {\n",
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" for (i, n) in nums.iter().enumerate() {\n",
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" for (k, m) in nums.iter().enumerate() {\n",
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" if i == k {\n",
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" continue;\n",
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" } else if n + m == target {\n",
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" return vec![i as i32, k as i32];\n",
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" }\n",
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" }\n",
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" }\n",
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" vec![]\n",
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"}"
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]
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},
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{
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"cell_type": "markdown",
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"id": "4278ee69-8a33-480c-a33b-1049bcec1eed",
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"metadata": {},
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"source": [
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"# Second variant O(n)"
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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": 24,
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"id": "7ad2762a-1deb-46ce-93fb-84b6ef637951",
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"metadata": {
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"tags": []
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},
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"outputs": [],
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"source": [
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"use std::collections::HashMap;\n",
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"\n",
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"pub fn two_sum(nums: Vec<i32>, target: i32) -> Vec<i32> {\n",
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" let mut hm = HashMap::<i32, i32>::new();\n",
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" \n",
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" for (i, n) in nums.into_iter().enumerate() {\n",
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" if let Some(k) = hm.get(&(target - n)) {\n",
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" return vec![*k, i as i32];\n",
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" } else {\n",
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" hm.insert(n, i as i32);\n",
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" }\n",
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" }\n",
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" vec![]\n",
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"}"
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]
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},
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{
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"cell_type": "markdown",
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"id": "d14e0757-f7eb-4c52-aab7-53a47b707377",
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"metadata": {},
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"source": [
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"# Tests"
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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": 25,
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"id": "8bdf4378-b7b4-4edb-a409-4e3f98517c41",
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"metadata": {
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"tags": []
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},
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"outputs": [],
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"source": [
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"assert_eq!(two_sum(vec![2,7,11,15], 9), vec![0,1]);\n",
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"assert_eq!(two_sum(vec![3,2,4], 6), vec![1,2]);\n",
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"assert_eq!(two_sum(vec![3,3], 6), vec![0,1]);"
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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": null,
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"id": "150230c1-b43b-4275-8be7-3f35761cb19f",
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"metadata": {},
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"outputs": [],
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"source": []
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}
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],
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"metadata": {
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"kernelspec": {
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"display_name": "rust-Rust kernel",
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"language": "rust",
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"name": "rust-rust"
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},
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"language_info": {
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"codemirror_mode": "rust",
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"file_extension": ".rs",
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"mimetype": "text/rust",
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"name": "Rust",
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"pygment_lexer": "rust",
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"version": ""
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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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