SOURCE

let  randomNum = (max, min, degree) =>{
     let arr = [];
     let ifStop = false;
     for(let i=0; i < degree; i++){
         arr.push(Math.floor(Math.random()*(max-min+1)+min))
     }
     return arr
}
let arr =randomNum(20,0,20)
var twoSum = function(arr, target) {
    let newArr = []
    for(let i=0;i<arr.length;i++){
        for(let j=0;j<arr.length;j++){
            if(i!=j & arr[i]+arr[j]==target){
                newArr.push([i,j])
            }
        }
    }
    for(let i=0;i<newArr.length;i++){
        for(let j=0;j<newArr.length;j++){
            if(j!=i){
                if(newArr[i].includes(newArr[j][0],newArr[j][1])){
                    newArr.splice(j,1)
                }
            }
            j--
        }
    }

    return newArr
};
console.log(arr)
console.log(twoSum(arr,18))