#include <stdio.h>
 
int main(void) {
	int arr1[10], arr2[10], arr3[20];
	arr1[0] = 1; arr2[0] = 12;
	arr1[1] = 2; arr2[1] = 20;
	arr1[2] = 3; arr2[2] = 30;
	arr1[3] = 4; arr2[3] = 40;
	arr1[4] = 5; arr2[4] = 50;
	arr1[5] = 6; arr2[5] = 60;
	arr1[6] = 7; arr2[6] = 70;
	arr1[7] = 8; arr2[7] = 80;
	arr1[8] = 9; arr2[8] = 90;
	arr1[9] = 11;arr2[9] = 100;
 
	for (int i = 0; i < 10; i++){
	    arr3[i*2] = arr1[i];
	    arr3[i*2 + 1] = arr2[i];
	}
 
	for(int j = 0; j<20; j++){
		printf("%d ", arr3[j]);
	}
 
	return 0;
}
 

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