#include <stdio.h>
//0을 F, 1을 T로 간주했습니다
int main(){
    int n, input, i;
    int arr[2002]={0, };    // 1~1000 양수 1001~2000 음수(-1000, -999, ...)
 
    scanf("%d",&n);    
 
    for(i=0;i<n;i++){
        scanf("%d ", &input);
        if(input<0)
            arr[input+2001]=1;
        else if(input>0)
            arr[input]=1;
    }
    printf("\n");
 
    for(i=1001;i<=2000;i++){
        if(arr[i]!=0)
            printf("%d ", i-2001);
    }
 
    for(i=1;i<=1000;i++){
        if(arr[i]!=0)
            printf("%d ", i);
    }
}

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

NAotMiAtMSAwIDA=

4
-2 -1 0 0