function Main(input) {
    const input_data = input.split("\n");
    const N = parseInt(input_data[0]);
    input_data.shift();
    const numbers = input_data;
    var sum = BigInt(0);
    for (i = 0; i < N; i++) {
        sum += BigInt(numbers[i]);
    }
    console.log(String(sum));
}
Main(require("fs").readFileSync("/dev/stdin", "utf8"));