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#include <bits/stdc++.h>

int main() {
  int64_t n, m;
  std::cin >> n >> m;

  std::vector<int64_t> data(n);
  for(int64_t i=0; i<n; i++) {
    std::cin >> data[i];
  }

  while(m --> 0) {
    int64_t t;
    std::cin >> t;

    int64_t accum = 0;
    int64_t last = 0;
    for(int i=0; i<n; i++) {
      if(data[i] < last + t) {
        accum += last + t - data[i];
        last += t;
      } else {
        last = data[i];
      }

    }

    std::cout << accum << std::endl;
  }
}