package g0001_0100.s0001_two_sum;

// #Easy #Top_100_Liked_Questions #Top_Interview_Questions #Array #Hash_Table
// #Data_Structure_I_Day_2_Array #Level_1_Day_13_Hashmap #Udemy_Arrays
// #2022_06_13_Time_4_ms_(69.91%)_Space_45.7_MB_(33.80%)

import java.util.HashMap;
import java.util.Map;

public class Solution {
    public int[] twoSum(int[] numbers, int target) {
        Map<Integer, Integer> indexMap = new HashMap<>();
        for (int i = 0; i < numbers.length; i++) {
            Integer requiredNum = target - numbers[i];
            if (indexMap.containsKey(requiredNum)) {
                return new int[] {indexMap.get(requiredNum), i};
            }
            indexMap.put(numbers[i], i);
        }
        return new int[] {-1, -1};
    }
}
