Initiate

简单水题找规律

#include<iostream>
using namespace std;
int t,n,m,k;
int f(int a,int b)
{
 if(a==b){
  if(a%2==0) return 2*a;
  else return 2*a-1;}
 else if(a-2==b){
  if(a%2==0) return a+b;
  else return a+b-1;}
 else return -1;
 }
int main()
{
 cin>>t;
 while(t--)
 {
  cin>>m>>n;
  k=f(m,n);
  if(k==-1) cout<<"No Number"<<endl;
  else cout<<k<<endl;
  }
 return 0;
 }