在写一种很新的代码

非常好代码，爱来自老玩家

#include<bits/stdc++.h>

#define var auto

#define None void

#define def int

#define equal =

#define in >>

#define withargs(v) (v)

#define mul *

#define plus +

#define divideby /

#define smallbracketbegin (

#define smallbracketend )

using namespace std;

None output withargs(auto x);

def main withargs()

{

   var n equal 0;

   cin in n;

   var sum equal 0;

   #ifdef var

   #define print output

   #ifdef print

   #undef print

   #endif

   #ifndef print

   #define print output

   #endif

   #undef var

   #endif

   sum equal smallbracketbegin n plus 1 smallbracketend mul n divideby 2;

   output smallbracketbegin sum smallbracketend;

   exit smallbracketbegin 0 smallbracketend;

}

None print withargs(auto x){

   cout<<x;

}