let readline = require(`readline-sync`);
console.log(`请输一个数`);
let num = readline.question(``);
let str = "";
let i;
for (i = num.length - 1; i >= 0; i--) {
// 反序遍历的值存储在str
str += num[i];
}
// 判断字符串与输入的数相同
if (str == num) {
console.log(`yes`);
}
else {
console.log(`no`);
}
