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#include <cstdio>
#include <climits>

int main()
{
  int mx = INT_MAX;
  int n;
  int sum = 0;

  scanf("%d", &n);
  while (n--)
  {
    int x;
    scanf("%d", &x);

    sum += x;

    if (x % 2 && x < mx)
      mx = x;
  }

  if (sum % 2 == 0)
    printf("%d\n", sum);
  else if (sum - mx <= 0)
    printf("NIESTETY\n");
  else
    printf("%d\n", sum - mx);
}