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import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.IOException;

class kie {
	public static void main(String[] args) {
		try (BufferedReader Console = new BufferedReader(new InputStreamReader(System.in))) {
			int Length = Integer.parseInt(Console.readLine());
			int[] Cash = ReadIntArrayFromConsole(Console, Length);
			CheckCoins(Cash);
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
	
	private static void CheckCoins(int[] Cash) {
		long CashTotal = 0;
		for (int CurrentIndex = 0; CurrentIndex < Cash.length; CurrentIndex++) {
			CashTotal = CashTotal + Cash[CurrentIndex];
		}
		long CashMax;
		for (CashMax = CashTotal; CashMax > 0; CashMax--) {
			if (IsEvenLong(CashMax) && IsContainTotalTwice(Cash, CashMax / 2)) {
				break;
			}
		}
		if (!(CashMax > 0)) {
			System.out.println("NIESTETY");
		} else {
			System.out.println(CashMax);
		}
	}
	
	private static boolean IsEvenLong(long InputLong) {
		long HalfLong = (InputLong / 2);
		return (InputLong == (HalfLong * 2));
	}
	
	private static boolean IsContainTotalTwice(int[] Cash, long CashCount) {
		long CashStateOne = 0;
		long CashStateTwo = 0;
		for (int CurrentIndex = 0; CurrentIndex < Cash.length; CurrentIndex++) {
			if (CashStateOne < CashCount) {
				CashStateOne = CashStateOne + Cash[CurrentIndex];
			} else {
				if (CashStateOne != CashStateTwo) {
					CashStateTwo = CashStateTwo + Cash[CurrentIndex];
				} else {
					return true;
				}
			}
		}
		return false;
	}
	
	private static int[] ReadIntArrayFromConsole(BufferedReader ConsoleReader, int Length) throws IOException {
		String[] Input = ConsoleReader.readLine().split(" ");
		int[] ResultArray = new int[Length];
		for (int Index = 0; Index < Length; Index++) {
			ResultArray[Index] = Integer.parseInt(Input[Index]);
		}
		return ResultArray;
	}
}