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

const arr1 = input.split('\n');
const arr2 = arr1[1].split(' ');
let N = parseInt(arr1[0]);
let sum = 0;

for(let i = 0; i < N; i++) {
    sum = sum + parseInt(arr2[i]);
}
console.log(sum);