function solve(params){
    params.pop();
    let houses=params.shift().split(`@`).map(Number);
    let santaIndex=0;
    for (let param of params) {
        let jumpLength=Number(param.split(` `)[1]);
        santaIndex=(santaIndex+jumpLength)%houses.length;

        if(houses[santaIndex]<=0){
            console.log(`House ${santaIndex} will have a Merry Christmas.`)
        }
        houses[santaIndex]-=2
    }
console.log(`Santa's last position was ${santaIndex}`);
let failedHouses=0;
for (let house of houses) {
    if (house>0){
    failedHouses++;
    }

}
if(failedHouses>0){
    console.log(`Santa has failed ${failedHouses} houses.`)

}else{
    console.log(`Mission was successful!`)
}

}
solve([
    `10@10@10@2`,
    `Jump 1`,
    `Jump 2`,
    `Merry Xmas`,

])