Language: Java

import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.Arrays;
import java.util.NoSuchElementException;

public class Main implements Runnable {
	public static void main(String[] args) {
		new Thread(null, new Main(), "", Runtime.getRuntime().maxMemory()).start();
	}

	public void run() {
		Scanner sc = new Scanner();
		int Q = sc.nextInt();
		long[] A = new long[Q];
		long[] B = new long[Q];
		for (int i = 0; i < Q; ++i) {
			A[i] = sc.nextLong();
			B[i] = sc.nextLong();
			if (A[i] > B[i]) {
				A[i] ^= B[i];
				B[i] ^= A[i];
				A[i] ^= B[i];
			}
			long prd = A[i] * B[i];
			if (A[i] == B[i] && A[i] == 1) {
				System.out.println(0);
				continue;
			}
          	long ok=0,ng=Math.max(A[i],B[i])
            while(ng-ok>1){
            	long m=(ok+ng)/2;
                if(m*m<prd)ok=m;
              	else ng=m;
            }
			long x = ok;
			while ((x + 1) < (prd - 1) / (x + 1))
				++x;
			if (A[i] == B[i] && x + 1 == (prd - 1) / x && x + 1 == A[i])
				System.out.println(2 * x - 1);
			else if (A[i] == B[i])
				System.out.println(2 * x);
			else if (A[i] != B[i])
				if (x == (prd - 1) / x)
					System.out.println(2 * x - 2);
				else
					System.out.println(2 * x - 1);
		}

	}

	class Scanner {
		private final InputStream in = System.in;
		private final byte[] buffer = new byte[1024];
		private int ptr = 0;
		private int buflen = 0;

		private boolean hasNextByte() {
			if (ptr < buflen) {
				return true;
			} else {
				ptr = 0;
				try {
					buflen = in.read(buffer);
				} catch (IOException e) {
					e.printStackTrace();
				}
				if (buflen <= 0) {
					return false;
				}
			}
			return true;
		}

		private int readByte() {
			if (hasNextByte())
				return buffer[ptr++];
			else
				return -1;
		}

		private boolean isPrintableChar(int c) {
			return 33 <= c && c <= 126;
		}

		public boolean hasNext() {
			while (hasNextByte() && !isPrintableChar(buffer[ptr]))
				ptr++;
			return hasNextByte();
		}

		public String next() {
			if (!hasNext())
				throw new NoSuchElementException();
			StringBuilder sb = new StringBuilder();
			int b = readByte();
			while (isPrintableChar(b)) {
				sb.appendCodePoint(b);
				b = readByte();
			}
			return sb.toString();
		}

		public long nextLong() {
			if (!hasNext())
				throw new NoSuchElementException();
			long n = 0;
			boolean minus = false;
			int b = readByte();
			if (b == '-') {
				minus = true;
				b = readByte();
			}
			if (b < '0' || '9' < b) {
				throw new NumberFormatException();
			}
			while (true) {
				if ('0' <= b && b <= '9') {
					n *= 10;
					n += b - '0';
				} else if (b == -1 || !isPrintableChar(b)) {
					return minus ? -n : n;
				} else {
					throw new NumberFormatException();
				}
				b = readByte();
			}
		}

		public int nextInt() {
			long nl = nextLong();
			if (nl < Integer.MIN_VALUE || nl > Integer.MAX_VALUE)
				throw new NumberFormatException();
			return (int) nl;
		}

		public double nextDouble() {
			return Double.parseDouble(next());
		}

	}

	static void tr(Object... objects) {
		System.out.println(Arrays.deepToString(objects));
	}
}


Compiler output:
Main.java:32: error: ';' expected
          	long ok=0,ng=Math.max(A[i],B[i])
          	                                ^
1 error