Balancing Bacteria

    1#include <bits/stdc++.h>
    2using namespace std;
    3#define int long long
    4int n;
    5signed main(){
    6    ios::sync_with_stdio(0); cin.tie(0);
    7    cin >> n;
    8    vector<int> v(n);
    9    for(int i = 0; i < n; i++) cin >> v[i];
    10    vector<int> diff(n);
    11    diff[0] = v[0];
    12    for(int i = 1; i < v.size(); i++){
    13        diff[i] = v[i] - v[i - 1];
    14    }
    15    int ans = abs(diff[0]);
    16    for(int i = 1; i < diff.size(); i++){
    17        ans += abs(diff[i] - diff[i - 1]);
    18    }
    19    cout << ans << '\n';
    20    return 0;
    21}