You are given two integers xx and yy (it is guaranteed that x>yx>y). You may choose any prime integer pp and subtract it any number of times from xx. Is it possible to make xx equal to yy?

Recall that a prime number is a positive integer that has exactly two positive divisors: 11 and this integer itself. The sequence of prime numbers starts with 22, 33, 55, 77, 1111.

Your program should solve tt independent test cases.

The first line contains one integer tt (1≤t≤10001≤t≤1000) — the number of test cases.

Then tt lines follow, each describing a test case. Each line contains two integers xx and yy (1≤y<x≤10181≤y<x≤1018).

For each test case, print YES if it is possible to choose a prime number pp and subtract it any number of times from xx so that xx becomes equal to yy. Otherwise, print NO.

You may print every letter in any case you want (so, for example, the strings yEs, yes, Yes, and YES will all be recognized as positive answer).

In the first test of the example you may choose p=2p=2 and subtract it once.

In the second test of the example you may choose p=5p=5 and subtract it twice. Note that you cannot choose p=7p=7, subtract it, then choose p=3p=3 and subtract it again.

In the third test of the example you may choose p=3p=3 and subtract it 333333333333333333333333333333333333 times.

特判 0，1。

因为任何一个数都可以由 2 或者 2+1 组成，所以直接判断就行

int main()
{
    int t;
    cin>>t;
    while(t--)
    {
        cin>>n>>m;
        if(n==m || n==m+1) cout<<"NO"<<endl;
        else if((n-m)%2==0 ||(n-m)%3==0||(n-m)%5==0||(n-m)%7==0 )
            cout<<"YES"<<endl;
    }
}

/**
     * Copy the property values of the given source bean into the target bean.
     * <p>Note: The source and target classes do not have to match or even be derived
     * from each other, as long as the properties match. Any bean properties that the
     * source bean exposes but the target bean does not will silently be ignored.
     * <p>This is just a convenience method. For more complex transfer needs,
     * consider using a full BeanWrapper.
     * @param source the source bean
     * @param target the target bean
     * @throws BeansException if the copying failed
     * @see BeanWrapper
     */
    public static void copyProperties(Object source, Object target) throws BeansException {
        copyProperties(source, target, null, (String[]) null);
    }

OrderMasterDO orderMasterDO = new OrderMasterDO();
orderMasterDO.setOrderId(orderMasterDTO.getOrderId());
orderMasterDO.setBuyerName(orderMasterDTO.getBuyerName());
orderMasterDO.setOrderStatus(orderMasterDTO.getOrderStatus());
orderMasterDO.setCreateTimestamp(orderMasterDTO.getCreateTimestamp());
orderMasterDO.setUpdateTimestamp(orderMasterDTO.getUpdateTimestamp());

1、错误描述

Compiling to file... D:\Program Files (x86)\workspaces\report4.jasper
  Compilation running time: 3,096! 
  Filling report...
  Locale: 中文 (中国)
  Time zone: Default
Error filling print... Error evaluating expression :      Source text : ID 
net.sf.jasperreports.engine.fill.JRExpressionEvalException: Error evaluating expression :      Source text : ID      at net.sf.jasperreports.engine.fill.JREvaluator.evaluate(JREvaluator.java:263)      
    at net.sf.jasperreports.engine.fill.JRCalculator.evaluate(JRCalculator.java:611)      
    at net.sf.jasperreports.engine.fill.JRCalculator.evaluate(JRCalculator.java:579)      at net.sf.jasperreports.engine.fill.JRFillElement.evaluateExpression(JRFillElement.java:1016)      at net.sf.jasperreports.engine.fill.JRFillTextField.evaluateText(JRFillTextField.java:504)      at net.sf.jasperreports.engine.fill.JRFillTextField.evaluate(JRFillTextField.java:488)      at net.sf.jasperreports.engine.fill.JRFillElementContainer.evaluate(JRFillElementContainer.java:259)      at net.sf.jasperreports.engine.fill.JRFillBand.evaluate(JRFillBand.java:456)      at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillBandNoOverflow(JRVerticalFiller.java:467)      at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillColumnHeader(JRVerticalFiller.java:512)      at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillReportStart(JRVerticalFiller.java:294)      at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillReport(JRVerticalFiller.java:152)      
    at net.sf.jasperreports.engine.fill.JRBaseFiller.fill(JRBaseFiller.java:963)      
    at net.sf.jasperreports.engine.fill.JRBaseFiller.fill(JRBaseFiller.java:873)      
    at net.sf.jasperreports.engine.fill.JRFiller.fill(JRFiller.java:87)      
    at net.sf.jasperreports.engine.JasperFillManager.fill(JasperFillManager.java:287)      
    at net.sf.jasperreports.engine.JasperFillManager.fillReport(JasperFillManager.java:760)      at com.jaspersoft.ireport.designer.compiler.IReportCompiler.run(IReportCompiler.java:891)      
    at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:572)      
    at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:997)  Caused by: groovy.lang.MissingPropertyException: No such property: ID for class: report4_1445910598157_686313      at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.unwrap(ScriptBytecodeAdapter.java:50)      at org.codehaus.groovy.runtime.callsite.GetEffectivePogopropertySite.getProperty(GetEffectivePogopropertySite.java:86)      at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callGroovyObjectGetProperty(AbstractCallSite.java:231)      at report4_1445910598157_686313.evaluate(calculator_report4_1445910598157_686313:180)      at net.sf.jasperreports.engine.fill.JREvaluator.evaluate(JREvaluator.java:250)      ... 19 more  
Print not filled. Try to use an EmptyDataSource...

2、错误原因

     从错误提示可知，显示是没有ID这个属性，导致错误

3、解决办法

     修改这个设置，保证每个字段都存在，描述都正确

//报错代码
<c:forEach items="${order.orderItems } "  var="orderItem">
//成功代码
<c:forEach items="${order.orderItems }"  var="orderItem">