function Main(input) {
  const data = input.split("\n");
  const N = data[0];

    
  let sum = BigInt(0);

  for (i=0; i<N; i++) {
    sum = BigInt(data[i+1]) + sum;
  }

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