Variable Length Sliding Window

/**
 * Title: Variable Length Sliding window
 * Author: Samuel Finocchio
 * Date: 05/03/2023
 *
 */

#include <iostream>
#include <vector>
#include <limits>

int main() {
  int N, C;
  std::cin >> N >> C;

  std::vector<int> numbers;
  numbers.reserve(N);

  for (int i = 0; i < N; i++) {
    int temp;
    std::cin >> temp;

    numbers.push_back(temp);
  }

  int optimal = std::numeric_limits<int>::max();

  int start = 0, end = 0, sum = numbers.at(0);
  while (start < numbers.size()) {
    if (sum >= C) {
      optimal = std::min(optimal, (end - start) + 1);
      // Removing from left side
      sum = sum - (numbers.at(start));
      start++;
    } else {
      // Adding to the right side
      end++;

      if (end < numbers.size()) {
        sum = sum + (numbers.at(end));
      } else {
        break;
      }
    }
  }

  std::cout << optimal;
  return 0;
}