array of integers, sum = 0 of all unique triplets
int target;
for (i =0 to n) for j (i+1 to n) k (j + 1 to n) sum = +arr[k]
three sum array of integers, sum = 0 of all unique triplets int target; for (i =0 to n) for j (i+1 to n) k (j + 1 to n) sum = +arr[k].
array of integers, sum = 0 of all unique triplets
int target;
for (i =0 to n) for j (i+1 to n) k (j + 1 to n) sum = +arr[k]