25 lines
516 B
C++
25 lines
516 B
C++
#include<cstdio>
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#include<cstring>
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#include<algorithm>
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using namespace std;
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const int N = 50009;
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int a[N];
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int main(){
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int n, i, j, k;
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while(~scanf("%d", &n) && n)
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{
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for(i = 0; i < n; ++i)
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scanf("%d", &a[i]);
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sort(a, a+n);
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printf("%d-A", a[0]);
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for(i = n-1; i >= 1; --i){
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if(i&1)
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printf(" %d-B", a[i]);
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else
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printf(" %d-A",a[i]);
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}
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puts("");
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}
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return 0;
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}
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