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Ò»¡¢¿ìËÙÅÅÐò //¿ìËÙÅÅÐò void quick_sort(int a[],int l,int r) { if( l >= r ) return; int i = l - 1, j = r + 1, x = a[l + r >> 1];// xa56爆大奖在线娱乐ÖмäÖµ l + r >> 1 == (l + r)