d41

let whereTheBall = (grid) => {
    let tempArr = [];
    for (let i = 0; i < grid[0].length; i++) {
        let ball = i;
        tempArr.push(-1);
        for (let j = 0; j < grid.length; j++) {
            if (grid[j][ball] === 1 && grid[j][ball + 1] === 1) { ball = ball + 1; }
            else if (grid[j][ball] === -1 && grid[j][ball - 1] === -1) { ball = ball - 1; }
            else break;
            if (j === grid.length - 1) {
                tempArr.pop();
                tempArr.push(ball);
            };
        }
    }
    return tempArr;
};