"use strict";
function Main(input) {
    const series = input.split("\n")[1].split(" ").map(i => BigInt(i));
    const ans = series.reduce((accum, value) => {
        return accum + value;
    }, BigInt(0));
    console.log(String(ans));
}
//テストの入力を受け取る
Main(require("fs").readFileSync("/dev/stdin", "utf8"));
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