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Competitive_Coding-3 #927

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Competitive_Coding-3 #927

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24 changes: 24 additions & 0 deletions findPairs
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Original file line number Diff line number Diff line change
@@ -0,0 +1,24 @@
class Solution {
public int findPairs(int[] nums, int k) {
HashMap<Integer, Integer> map = new HashMap<>();
int finalPair = 0;
// Count frequency of each number in nums
for (int i=0;i<nums.length;i++) {
if(map.containsKey(nums[i])) {
map.put(nums[i], map.get(nums[i]) + 1);
} else {
map.put(nums[i], 1);
}

}

for(int i : map.keySet()) {
int diff = i - k;
if((k == 0 && map.get(i) > 1) || (k > 0 && map.containsKey(diff))) {
finalPair++;
}
}

return finalPair;
}
}