function Main(input) {
    var oridata = input.split("\n")[1];
    var datas = oridata.split(' ').map(function (i) { return Number(i); });
    var Answer = datas.reduce(function (accum, current) {
        return accum + current;
    }, 0);
    console.log(Answer);
}
Main(require("fs").readFileSync("/dev/stdin", "utf8"));