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Solution.java
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58 lines (46 loc) · 1.81 KB
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import java.io.*;
import java.util.*;
public class Solution {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
List<List<Integer>> numbers = getNumbersFromInput(scanner);
// It may be more appropriate to store queries as a tuple
List<List<Integer>> queries = getQueriesFromInput(scanner);
executeQueries(numbers, queries);
}
private static void executeQueries(List<List<Integer>> numbers, List<List<Integer>> queries) {
for (List<Integer> query : queries) {
Integer x = query.get(0);
Integer y = query.get(1);
try {
System.out.println(numbers.get(x - 1).get(y - 1));
} catch (IndexOutOfBoundsException e){
System.out.println("ERROR!");
}
}
}
private static List<List<Integer>> getNumbersFromInput(Scanner scanner) {
Integer numberOfLines = scanner.nextInt();
List<List<Integer>> lines = new ArrayList<>();
for (int i = 0; i < numberOfLines; i++) {
Integer numberOfElements = scanner.nextInt();
List<Integer> numbers = new ArrayList<Integer>();
for (int j = 0; j < numberOfElements; j++) {
numbers.add(scanner.nextInt());
}
lines.add(numbers);
}
return lines;
}
private static List<List<Integer>> getQueriesFromInput(Scanner scanner) {
Integer numberOfQueries = scanner.nextInt();
List<List<Integer>> queries = new ArrayList<>();
for (int i = 0; i < numberOfQueries; i++) {
List<Integer> query = new ArrayList<Integer>();
query.add(scanner.nextInt());
query.add(scanner.nextInt());
queries.add(query);
}
return queries;
}
}