一种高级解法

#include<iostream>
#define I using
#define AK namespace
#define IOI std
#define hello int
#define HELLO return
#define WORLD 0
#define inworld cin
#define outworld cout
I AK IOI;
hello helloworld(hello world,hello world1){
	HELLO (world+world1);
}
hello main(){
	hello world,world1;
	inworld>>world>>world1;
	outworld<<helloworld(world,world1);
	HELLO WORLD;
}

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