function Main(input) {
    const foo = input.split("\n");
    const hoge = foo.split(" ");
    
    const N = foo[0];
    
    let cal = 0;
    for(let i = 0; i <= N; i++) {
        cal = cal + hoge[i];
    }
    console.log(cal);
}

// Don't edit this line!
Main(require("fs").readFileSync("/dev/stdin", "utf8"));