#include <iostream>
using namespace std;
int x,y;
int main() {
x=10;
y=20;
cout<<"x= "<<x<<"\t"<<"y= "<<y<<endl;
int dep;
dep=x;
x=y;
y=dep;
cout<<"x= "<<x<<"\t"<<"y= "<<y<<endl;
return 0;
}
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