abc125_b_resale.cpp

// Resale | https://atcoder.jp/contests/abc125/tasks/abc125_b
// Time: O(n); extra space: O(n).
#include <algorithm>
#include <iostream>
#include <string>
#include <vector>

void solve() {
    int n;
    std::cin>>n;
    std::vector<int>v(n);
    for(int&x:v)std::cin>>x;
    int ans=0;
    for(int x:v) {
        int cost;
        std::cin>>cost;
        ans+=std::max(0,x-cost);
    }
    std::cout<<ans<<'\n';
}
int main() {
    std::ios::sync_with_stdio(false);
    std::cin.tie(nullptr);
    solve();
}