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| class Solution {
public int tupleSameProduct(int[] nums) {
int tupleCount = 0;
Map<Integer, Integer> productToCountMap = new HashMap<>();
for (int i = 0; i < nums.length - 1; i++) {
for (int j = i + 1; j < nums.length; j++) {
int product = nums[i] * nums[j];
int count = productToCountMap.getOrDefault(product, 0);
tupleCount += count * 8;
productToCountMap.put(product, count + 1);
}
}
return tupleCount;
}
}
|
References
1726. Tuple with Same Product