"use strict";
function Main(input) {
    let cin = new Inputer(input);
    let N = cin.getInt(), V = cin.getIntArray(N), C = cin.getIntArray(N);
    let VC = new Array(N);
    for (let n = 0; n < N; n++) {
        VC[n] = V[n] - C[n];
    }
    let ans = VC.reduce((ac, v) => ac + (v > 0 ? v : 0), 0);
    console.log(ans);
}
class Inputer{constructor(t){if(typeof t=='undefined')throw new Error('引数（stdin）を省略できません！');this.cnt=0,this.items=t.split(/\n|\s/)}getInt(){return this.items[this.cnt++]-0}getIntArray(t){if(typeof t=='undefined')throw new Error('引数（1以上）を省略できません！');let r=new Array(t);for(let e=0;e<t;e++)r[e]=this.getInt();return r}getStr(){return this.items[this.cnt++]}getStrArray(t){if(typeof t=='undefined')throw new Error('引数（1以上）を省略できません！');let r=new Array(t);for(let e=0;e<t;e++)r[e]=this.getStr();return r}}
if (typeof window == "undefined") Main(require("fs").readFileSync("/dev/stdin", "utf8"));