F1 Race

function solve(arr) {
    let racers = arr[0].split(' ');

    for (let i = 1; i < arr.length; i++) {
        let [cmd, currRacer] = arr[i].split(' ');

        if (cmd === 'Join') {
            if (!racers.includes(currRacer)) {
                racers.push(currRacer);
            }
        } else if (cmd === 'Crash') {
            if (racers.includes(currRacer)) {

                let racerIndex = racers.indexOf(currRacer);
                racers.splice(racerIndex, 1);
            }
        } else if (cmd === 'Pit') {
            if (racers.includes(currRacer)) {

                let racerIndex = racers.indexOf(currRacer);

                if (racerIndex + 1 < racers.length) {
                    racers.splice(racerIndex, 1);
                    racers.splice(racerIndex + 1, 0, currRacer);
                }
            }
        } else if (cmd === 'Overtake') {
            if (racers.includes(currRacer)) {

                let racerIndex = racers.indexOf(currRacer);

                if (racerIndex - 1 >= 0) {
                    racers.splice(racerIndex, 1);
                    racers.splice(racerIndex - 1, 0, currRacer);
                }
            }
        }
    }

    console.log(racers.join(' ~ '));
}

solve(["Vetel Hamilton Raikonnen Botas Slavi",
    "Pit Hamilton",
    "Overtake LeClerc",
    "Join Ricardo",
    "Crash Botas",
    "Overtake Ricardo",
    "Overtake Ricardo",
    "Overtake Ricardo",
    "Crash Slavi"]
);