Language: Java


import java.util.*;
import java.io.*;

public class AirConditioner{
    
    static class Reader {
        
        final private int BUFFER_SIZE = 1 << 16;
        private DataInputStream din;
        private byte[] buffer;
        private int bufferPointer, bytesRead;
        
        public Reader() {
            din = new DataInputStream(System.in);
            buffer = new byte[BUFFER_SIZE];
            bufferPointer = bytesRead = 0;
        }
        
        public Reader(String file_name) throws IOException {
            din = new DataInputStream(new FileInputStream(file_name));
            buffer = new byte[BUFFER_SIZE];
            bufferPointer = bytesRead = 0;
        }
        
        public String readLine() throws IOException {
            byte[] buf = new byte[64]; // line length 
            int cnt = 0, c;
            while ((c = read()) != -1) {
                if (c == '\n') {
                    break;
                }
                buf[cnt++] = (byte) c;
            }
            return new String(buf, 0, cnt);
        }
        
        public int nextInt() throws IOException {
            int ret = 0;
            byte c = read();
            while (c <= ' ') {
                c = read();
            }
            boolean neg = (c == '-');
            if (neg) {
                c = read();
            }
            do {
                ret = ret * 10 + c - '0';
            } while ((c = read()) >= '0' && c <= '9');
            
            if (neg) {
                return -ret;
            }
            return ret;
        }
        
        public long nextLong() throws IOException {
            long ret = 0;
            byte c = read();
            while (c <= ' ') {
                c = read();
            }
            boolean neg = (c == '-');
            if (neg) {
                c = read();
            }
            do {
                ret = ret * 10 + c - '0';
            } while ((c = read()) >= '0' && c <= '9');
            if (neg) {
                return -ret;
            }
            return ret;
        }
        
        public double nextDouble() throws IOException {
            double ret = 0, div = 1;
            byte c = read();
            while (c <= ' ') {
                c = read();
            }
            boolean neg = (c == '-');
            if (neg) {
                c = read();
            }
            
            do {
                ret = ret * 10 + c - '0';
            } while ((c = read()) >= '0' && c <= '9');
            
            if (c == '.') {
                while ((c = read()) >= '0' && c <= '9') {
                    ret += (c - '0') / (div *= 10);
                }
            }
            
            if (neg) {
                return -ret;
            }
            return ret;
        }
        
        private void fillBuffer() throws IOException {
            bytesRead = din.read(buffer, bufferPointer = 0, BUFFER_SIZE);
            if (bytesRead == -1) {
                buffer[0] = -1;
            }
        }
        
        private byte read() throws IOException {
            if (bufferPointer == bytesRead) {
                fillBuffer();
            }
            return buffer[bufferPointer++];
        }
        
        public void close() throws IOException {
            if (din == null) {
                return;
            }
            din.close();
        }
    }
    
    static class Comb {
        
        static long nCr(int n, int k) {
            long C[] = new long[k + 1];

            // nC0 is 1 
            C[0] = 1;
            
            for (int i = 1; i <= n; i++) {
                for (int j = Math.min(i, k); j > 0; j--) {
                    C[j] = C[j] + C[j - 1];
                }
            }
            return C[k];
        }
    }
    
    public static void main(String[] args) throws IOException {
        int mod = 1000000007;
        Reader sc = new Reader();
        int a= sc.nextInt();
        int b= sc.nextInt();
        int c= sc.nextInt();
        if((a==b&&c!=a)||(a==c&&b!=a)||(b==c&&c!=a)){
            System.out.println("YES");
        }
        else{
            System.out.println("NO");
        }
        
    }
}


Compiler output:
Main.java:5: error: class AirConditioner is public, should be declared in a file named AirConditioner.java
public class AirConditioner{
       ^
1 error