#include <stdio.h>

int main () {
  int n = 0;
  long long x = 0LL;
  long long a[400000] = {};
  
  int res = 0;
  
  long long ans = 0LL;
  long long tmp = 0LL;
  int idx = 0;
  
  res = scanf("%d", &n);
  res = scanf("%lld", &x);
  for (int i = 0; i < n; i++) {
    res = scanf("%lld", a+i);
    a[i+n] = a[i];
    ans += a[i];
  }
  
  if (ans <= x) {
    printf("%lld\n", ans);
    return 0;
  }
  
  ans = 0LL;
  for (int i = 0; i < n; i++) {
    if (a[i] > x) {
      tmp = 0LL;
      idx = i+1;
    } else {
      while (idx < i+n && a[idx]+tmp <= x) {
        tmp += a[idx];
        idx++;
      }
      if (tmp > ans) {
        ans = tmp;
      }
      tmp -= a[i];
    }
  }
  
  printf("%lld\n", ans);
  return 0;
}