'use strict'

const main = input => {
	const args = input.trim().split(' ')
	const a = parseInt(args[0], 10)
	const op = args[1]
	const b = parseInt(args[2], 10)

	if (op === '+') {
		console.log(a + b)
	} else {
		console.log(a - b)
	}
}

main(require('fs').readFileSync('/dev/stdin', 'utf8'))
