#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <math.h>

int main(){

int i,j,k,x;
int A[4];
int B[4];

for(i=0; i<4; i++){
printf("enter a number: ");
scanf("%d",&A[i]);
B[i] = A[i];
}

for(j=0; j<4; j++){
if(B[j]==B[j+1]){
printf("number %d is repeated, type other: ",B[j]);
scanf("%d",&B[j]);
}

printf("%d\n", B[j]);
}
system("pause");

return 0;
}