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

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