Revise paste Exam JS

1.Party profit
function partyProfit(input) {
    let partySize = Number(input[0]);
    let days = Number(input[1]);

let profit = 0;

for (let i = 1; i <= days; i++) {

if (i % 10 === 0) {
            partySize -= 2;

}
        if (i % 15 === 0) {
            partySize += 5;
        }

profit += 50;
        profit -= 2 * partySize;

if (i % 3 === 0) {
            profit -= 3 * partySize;
        }

if (i % 5 === 0) {
            profit += 20 * partySize;

if (i % 3 === 0) {
                profit -= partySize * 2;
            }
        }
    }

let personalProfit = Math.floor(profit / partySize);
    console.log(`${partySize} companions received ${personalProfit} coins each.`)
}

2.Easter Gifts
function easterGifts(input){

let gifts=input[0].split(" ");
   let commands=input.slice(1);

for (let i=0; i<commands.length-1; i++){
       let command=commands[i];

if (command.includes("OutOfStock"));
       let outArr=command.split(" ");
       let item=outArr[1];
    
       if (gifts.includes(item)){
          
      for (let i=0; i<gifts.length; i++){
          let gift=gifts[i];
          if (gift==item){
            gifts[i]="None"
          }
      }
       }

if (command.includes("Required")){
        let reqArr=command.split(" ");
        let newGift=reqArr[1];
        let indexOfOldGift=reqArr[2];

if (indexOfOldGift>=0 && indexOfOldGift<gifts.length){
            gifts.splice(indexOfOldGift,1,newGift);
        }
       }

if (command.includes ("JustInCase")){
           let jucArr=command.split(" ");
           let ng=jucArr[1];
           
           gifts[gifts.length-1]=ng;
       }
   }

let line="";
    for (let i=0; i<gifts.length; i++){
        let gift=gifts[i];
        if (gift!=="None"){
            line+=gift+" ";
        }
    }
    console.log(line);
}

3.Last Stop
function lastStop(input){
    let paintingsArr=input[0].split(" ");
    let commandsArr=input.slice(1);

for (let i=0; i<commandsArr.length; i++){
       let command=commandsArr[i];
        if (command.includes("Insert")){
            let insertArr=command.split(" ");
            let place=insertArr[1];
            place++;   
            let paintingNumber=insertArr[2];    
            if (place<paintingsArr.length&& place>=0){
            paintingsArr.splice(place,0,paintingNumber);
            }
    
        }
        if (command.includes("Switch")){
            let switchArr=command.split(" ");
            let paintingOne=switchArr[1];
            let paintingTwo=switchArr[2];
            let p1Index=paintingsArr.indexOf(paintingOne);
            let p2Index=paintingsArr.indexOf(paintingTwo);

if (p1Index>=0&& p1Index<paintingsArr.length && p2Index>=0 && p2Index<paintingsArr.length){
            paintingsArr.splice(p1Index,1,paintingTwo);
            paintingsArr.splice(p2Index,1,paintingOne);
            }
        }

if (command.includes("Hide")){
            let hideArr=command.split(" ");
            let paintingToRemove=hideArr[1];
           if (paintingsArr.includes(paintingToRemove)){
               let indexOfPaintingToRemove=paintingsArr.indexOf(paintingToRemove);
               paintingsArr.splice(indexOfPaintingToRemove,1);
      
           }
        }

if (command.includes("Reverse")){
            paintingsArr=paintingsArr.reverse();
      
        }

if (command.includes("Change")){
           let changeArr=command.split(" ");
           let paintingToBeChanged=changeArr[1];
           let changedPainting=changeArr[2];
           if (paintingsArr.includes(paintingToBeChanged)){
               let indexOfPainting=paintingsArr.indexOf(paintingToBeChanged);              
               paintingsArr[indexOfPainting]=changedPainting;
           
           }
        }

if (command.includes("END")){
            break;
        }
    };

console.log(paintingsArr.join(" "));
}