login

function solve(arr) {
    let username = arr[0];
    let password = '';
    for(let i = username.length - 1; i < arr.length - 1; i--){
        password += username[i];
    }
    let counter = 1;
    for(let i = 1; i <= arr.length - 1; i++){
        if(username === password){
            console.log(`User ${username} logged in.`);
            break;
        }
        counter ++;
        if(counter === 4){
            console.log(`User ${username} blocked!`);
            break;
        }else{
            console.log(`Incorrect password. Try again.`)
        }
    }
}