process.stdin.resume();
process.stdin.setEncoding('ascii');

var input_stdin = "";
var input_stdin_array = "";
var input_currentline = 0;

process.stdin.on('data', function (data) {
    input_stdin += data;
});

process.stdin.on('end', function () {
    input_stdin_array = input_stdin.split("\n");
    main();    
});

function readLine() {
    return input_stdin_array[input_currentline++];
}

/////////////// ignore above this line ////////////////////

function longestSequence(array) {
    
    
   var result = 0;
    
    
    
    for(let i = 0; i < array.length; i++){
        
        
    if(array[i] % 2 === 0){
        
        result += ((array[i] - 1 ) * 2) ;
    }
        else{
            
            if(array[i] === 1){
                result++;
            }
            else{
                result += array[i] + 1;
            }
        }
        
       
    }
 
  
    
    return result;
}

function main() {
    var n = parseInt(readLine());
    a = readLine().split(' ');
    a = a.map(Number);
    var result = longestSequence(a);
    process.stdout.write("" + result + "\n");

}