/*
 * Solution Template for Outbreak
 * 
 * Australian Informatics Olympiad 2026 Invitationals
 * 
 * This file is provided to assist with reading of input and writing of output
 * for the problem. You may modify this file however you wish, or
 * you may choose not to use this file at all.
 */

#include <stdio.h>

/* N is the number of villagers and is always odd. */
int N;
/* A contains the initial personality values. The array starts from 0. */
int A[200005];

int answer;
int main(void) {
  int i;

  /* Read the number of villagers and their initial values. */
  scanf("%d", &N);
  for (i = 0; i < N; i++) {
    scanf("%d", &A[i]);
  }

  /* TODO: Determine the last villager's personality value. */

  /* Write the answer. */
  printf("%d\n", answer);

  return 0;
}