const main = input => {
	const lines = input.trim().split('\n');
	const N = Number(lines[0].trim());
	const A = lines[1].trim().split(' ').map(n => BigInt(n));
	
	const ans = String(A.reduce((a, b) => a + b));
	console.log(ans);
}

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