function Main(input) {
  input = input.split('\n');
  let num = input[0];
  let ar_integer = input[1].split(' ');
  let sum = 0;

  while(num > 0) {
    sum += parseInt(ar_integer[num - 1]);
    num--;
  }

  console.log(sum);
}
Main(require('fs').readFileSync('/dev/stdin', 'utf8'));