HR30 Day 8: Dictionaries and Maps

1 개요

Day 8: Dictionaries and Maps

• https://www.hackerrank.com/challenges/30-dictionaries-and-maps/problem

해커랭크 30 Days of Code

문제	풀이
0-9 Day e
HR30 Day 0: Hello, World.
HR30 Day 1: Data Types
HR30 Day 2: Operators
HR30 Day 3: Intro to Conditional Statements
HR30 Day 4: Class vs. Instance
HR30 Day 5: Loops
HR30 Day 6: Let's Review
HR30 Day 7: Arrays
HR30 Day 8: Dictionaries and Maps
HR30 Day 9: Recursion

2 Java

HR자바 Java Map 문서를 참고하십시오.

import java.util.*;
import java.io.*;

class Solution {
    public static void main(String []argh) {
        Scanner in = new Scanner(System.in);
        int n = in.nextInt();
        HashMap<String, Integer> phoneBook = new HashMap<String, Integer>();
        for(int i=0; i<n; i++) {
            String name = in.next();
            int phone = in.nextInt();
            phoneBook.put(name, phone);
        }
        while(in.hasNext()) {
            String name = in.next();
            if (!phoneBook.containsKey(name)) {
                System.out.println("Not found");
                continue;
            }
            System.out.println(name + "=" + phoneBook.get(name));
        }
        in.close();
    }
}

3 PHP

<?php
$stdin = fopen("php://stdin", "r");
$n = rtrim(fgets($stdin));
$phoneBook = [];
for($i=0; $i<$n; $i++) {
    list($k,$v) = explode(' ',rtrim(fgets($stdin)));
    $phoneBook[$k] = $v;
}
while( $k = rtrim(fgets($stdin)) ) {
    if( !array_key_exists($k,$phoneBook) ) {
        echo "Not found\n";
        continue;
    }
    echo $k.'='.$phoneBook[$k]."\n";
}

4 Python

n = int(input())
phoneBook = {}
for _ in range(n):
    name, phoneNumber = input().split()
    phoneBook[name] = phoneNumber
while True:
    try:
        query = input()
    except:
        break
    if query in phoneBook:
        print( query + "=" + phoneBook[query] )
    else:
        print( "Not found" )