#include <bits/stdc++.h>   using namespace std;   long long n, w, a[1123], d, mx, mn;   int main() {     cin >> n >> w;     for (int i = 0; i < n; ++i) {       cin >> a[i];       d += a[i];       mx = max(d, mx);       mn = min(d, mn);     }     cout << max(w + 1 - mx + mn, 0ll);   }   