https://www.acmicpc.net/problem/1541
const N = require("fs")
.readFileSync(process.platform === "linux" ? "/dev/stdin" : "./input.txt")
.toString();
// -를 기준으로 분리
let list = N.split("-");
let answer = 0;
for (let i = 0; i < list.length; i++) {
let cur = list[i]
.split("+")
.map(Number)
.reduce((a, b) => a + b);
if (i === 0) answer += cur;
else answer -= cur;
}
console.log(answer);