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  1. import java.io.*;
  2. import java.util.*;
  3.  
  4. import static java.lang.Math.*;
  5.  
  6. public class Main {
  7.     FastScanner in;
  8.     PrintWriter out;
  9.  
  10.     static final String FILE = "powerstower";
  11.  
  12.     void solve() {
  13.         int n = in.nextInt();
  14.         int[] ms = new int[n];
  15.         for (int i = 0; i < n; i++)
  16.             ms[i] = in.nextInt();
  17.         if (n == 1) {
  18.             out.print(ms[0] % 3);
  19.             return;
  20.         }
  21.         for (int i = n - 1; i >= 1; i--) {
  22.             ms[i] %= 2;
  23.             if (ms[i] == 0)
  24.                 ms[i] = 0;
  25.             else
  26.                 ms[i] = 1;
  27.             if (i + 1 < n && ms[i + 1] == 0)
  28.                 ms[i] = 1;
  29.         }
  30.         int old = ms[0];
  31.         ms[0] %= 3;
  32.         if (ms[0] != 2)
  33.             out.print(ms[0]);
  34.         else
  35.             out.print(ms[1] == 0 ? 1 : 2);
  36.     }
  37.  
  38.     public void run() {
  39.         if (FILE.equals("")) {
  40.             in = new FastScanner(System.in);
  41.             out = new PrintWriter(System.out);
  42.         } else {
  43.             try {
  44.                 in = new FastScanner(new FileInputStream(FILE +
  45.                         ".in"));
  46.                 out = new PrintWriter(new FileOutputStream(FILE +
  47.                         ".out"));
  48.             } catch (FileNotFoundException e) {
  49.                 e.printStackTrace();
  50.             }
  51.         }
  52.         solve();
  53.         out.close();
  54.     }
  55.  
  56.     public static void main(String[] args) {
  57.         (new Main()).run();
  58.     }
  59.  
  60.     class FastScanner {
  61.         BufferedReader br;
  62.         StringTokenizer st;
  63.  
  64.         public FastScanner(InputStream is) {
  65.             br = new BufferedReader(new InputStreamReader(is));
  66.         }
  67.  
  68.         public String next() {
  69.             while (st == null || !st.hasMoreTokens()) {
  70.                 try {
  71.                     st = new StringTokenizer(br.readLine());
  72.                 } catch (IOException e) {
  73.                     e.printStackTrace();
  74.                 }
  75.             }
  76.             return st.nextToken();
  77.         }
  78.  
  79.         public String nextLine() {
  80.             st = null;
  81.             try {
  82.                 return br.readLine();
  83.             } catch (IOException e) {
  84.                 e.printStackTrace();
  85.                 return null;
  86.             }
  87.         }
  88.  
  89.         public int nextInt() {
  90.             return Integer.parseInt(next());
  91.         }
  92.  
  93.         public long nextLong() {
  94.             return Long.parseLong(next());
  95.         }
  96.  
  97.         public double nextDouble() {
  98.             return Double.parseDouble(next());
  99.         }
  100.  
  101.         public float nextFloat() {
  102.             return Float.parseFloat(next());
  103.         }
  104.     }
  105.  
  106. }
Runtime error #stdin #stdout #stderr 0.04s 711168KB
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stdin
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Standard input is empty
stdout
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Standard output is empty
stderr
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java.io.FileNotFoundException: powerstower.in (No such file or directory)
	at java.io.FileInputStream.open0(Native Method)
	at java.io.FileInputStream.open(FileInputStream.java:195)
	at java.io.FileInputStream.<init>(FileInputStream.java:138)
	at java.io.FileInputStream.<init>(FileInputStream.java:93)
	at Main.run(Main.java:44)
	at Main.main(Main.java:57)
Exception in thread "main" java.lang.NullPointerException
	at Main.solve(Main.java:13)
	at Main.run(Main.java:52)
	at Main.main(Main.java:57)
https://ideone.com/ndDl4I
language:
Java (HotSpot 12)
created:
8 years ago
visibility:
secret

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