题目1136：Number Steps

import java.io.IOException;import java.io.FileReader;import java.io.InputStreamReader;import java.io.BufferedReader;import java.util.Scanner;class Main{public static final boolean DEBUG = false;public static void main(String[] args) throws IOException{Scanner cin;int x, y;int t;if (DEBUG) {cin = new Scanner(new FileReader("d:\\OJ\\uva_in.txt"));} else {cin = new Scanner(new InputStreamReader(System.in));}t = cin.nextInt();for (int i = 0; i < t; i++) {x = cin.nextInt();y = cin.nextInt();if (x == y || x - y == 2) {int ans = 4 * (x / 2);if ((x & 1) != 0) ans += 1;if (x - y == 2) ans -= 2;System.out.println(ans);} else {System.out.println("No Number");}}}}