
const { count } = require("console");
const fs = require("fs");
const { nextTick } = require("process");
const filePath = process.platform === "linux" ? "/dev/stdin" : "./예제.txt";
let input = fs.readFileSync(filePath).toString().trim();
// const fs = require('fs');
// let input = fs.readFileSync("/dev/stdin").toString().trim();
input = input.split('\n')
let [N, M]=input.shift().split(' ').map((el)=>+el)
if (N === 1) {
console.log(1);
}
else if (N === 2) {
console.log(Math.min(4, parseInt((M + 1) / 2)));
}
else {
if (M <= 6) {
console.log(Math.min(4, M));
}
else {
console.log(M - 2);
}
}
https://ghost4551.tistory.com/20