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LeetCode Two Sum
Java HashMap 基本操作在这题里
public class Solution {
public int[] twoSum(int[] nums, int target) {
Map<Integer, Integer> map = new HashMap<Integer, Integer>(); // Constructor
for(int i=nums.length-1; i>=0; i--){
int adder = target-nums[i];
if(map.containsKey(adder)){ // Check if map has the key
return new int[] {i+1, map.get(adder)+1}; // Get the value from the key
}
else{
map.put(nums[i], i); // Add new key-value pair
}
}
return new int[] {-1, -1};
}
}
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2022年8月01日 21:32
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