console.clear(); function isUniqueQuadratic(arr) { for (let i = 0; i < arr.length; i++) { for (let j = 0; j < arr.length; j++) { if (i !== j && arr[i] === arr[j]) { return false; } } } return true; } let smallDuplicate = [1, 4, 6, 10, 4]; let largeDuplicate = _.range(3500).concat(5).concat(_.range(10000, 3510)); let smallUnique = [1, 4, 5, 10, 52]; let largeUnique = _.range(10000); console.log(isUniqueQuadratic(smallDuplicate)) console.log(isUniqueQuadratic(largeDuplicate)) console.log(isUniqueQuadratic(smallUnique)) console.log(isUniqueQuadratic(largeUnique))