WAWAWA求调

#include <iostream>
using namespace std;
int main() {
    long long n, x;
    cin >> n >> x;
    long long arr[n];
    for (long long i = 0;i < n;i ++) {
        cin >> arr[i];
    }
    long long ans = 0;
    for (long long i = 1;i < n;i ++) {
        if (arr[i - 1] + arr[i] > x) {
            // ffffffffffffffff**k
            arr[i] -= arr[i - 1] + arr[i] - x;
            ans += arr[i - 1] + arr[i] - x;
        }
    }
    cout << ans;
}