const input = require('fs').readFileSync('/dev/stdin', 'utf8');

//ここで定義するのは初期値
const arr1 = input.split('\n');
const arr2 = arr1[1].split(' ');
let N = parseInt(arr1[0]);
let sum = BigInt(0);

//A1~Anまでの合計、足し算N回
//arr2[1]からarr2[n]までN回の足し算
for(let i = 0; i < N; i++) {
    sum = sum + BigInt(arr2[i]);
}
console.log(sum.toString());