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#include<stdio.h>
int main()
{
int n;
scanf("%d\n",&n);
int a[n];
for(int i=0;i<n;i++){
scanf("%d",&a[i]);
}
printf("%d",a[0]);
int checker=0;
for(int i=1;i<n;i++){
for(int j=0;j<i;j++){
if(a[i]==a[j]){
checker=1;
}
}
if(checker==0){
printf(" %d",a[i]);
}
checker=0;
}
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