"use strict";
var GET=(function(){function f(s){return new g(s);}function g(s){this._s=s.trim().split("\n");this._y=0;}g.prototype.a=function(f){var s=this._s, y=this._y, r;if(typeof s[y]==="string")s[y]=s[y].split(" ").reverse();r=s[y].pop();if(!s[y].length)this._y++;return f?r:+r;};g.prototype.l=function(f){var s=this._s[this._y++].split(" ");return f?s:s.map(a=>+a);};g.prototype.m=function(n,f){var r=this._s.slice(this._y,this._y+=n).map(a=>a.split(" "));return f?r:r.map(a=>a.map(a=>+a));};g.prototype.r=function(n,f){var r=this._s.slice(this._y,this._y+=n);return f?r:r.map(a=>+a);};return f;})();
var o=GET(require("fs").readFileSync("/dev/stdin","utf8"));
function xArray(v){var a=arguments,l=a.length,r="Array(a["+--l+"]).fill(0).map(x=>{return "+v+";})";while(--l)r="Array(a["+l+"]).fill(0).map(x=>"+r+")";return eval(r);}
class nextPermutation{
  constructor(x){
    this.p = nextPermutation.f(x);
  }
  get next(){
    return this.p.next().value;
  }
  static *f(x){
    var q;
    if(typeof x === "number")q = [[],Array(x).fill().map((a,i)=>i+1)];
    else if(typeof x === "string")q = ["",x];
    else q = [[],x];
    while(q.length){
      var b = q.pop(), a = q.pop();
      if(b.length === 0)yield a;
      else for(var i = b.length; i--;){
        q.push(a.concat(b[i]), b.slice(0,i).concat(b.slice(i+1)));
      }
    }
  }
}

var myOut = main();
if(myOut !== undefined)console.log(myOut);
function main(){
  var n = o.a();
  var p = o.l();
  var q = o.l();
  var a = [p.join(""), q.join("")];
  a.sort();
  var np = new nextPermutation(Array(n).fill().map((a,i)=>i+1).join(""));
  var t;
  while(1){
    t = np.next;
    if(t === a[0])break;
  }
  var ans = 0;
  while(1){
    if(t === a[1])break;
    ans++;
    t = np.next;
  }
  return ans;
}