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POSPREFS.cpp
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76 lines (69 loc) · 866 Bytes
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#include <iostream>
using namespace std;
int main()
{
int t,j;
cin>>t;
while(t--)
{
int n,k,i,sum=0;
cin>>n>>k;
int a[n+1];
for(i=1;i<=n;)
{
if(k==0||k==n)
break;
if(sum+i<=i+1 && k>0)
{
a[i]=i;
sum+=i;
i++;
k--;
continue;
}
if(sum>i)
{
a[i]=-i;
sum-=i;
i++;
if(sum>0)
k--;
continue;
}
if(sum+i >i+1 &&k==1)
{
a[i]=-i;
i++;
if(sum-i>0)
break;
else
{
sum-=i;
continue;
}
}
if(sum+i >i+1 &&k>1)
{
a[i]=i;
if(sum>0)
k--;
sum+=i;
i++;
}
}
if(k==n)
{
for(i=1;i<=n;i++)
a[i]=i;
}
else if(i<=n)
{
for(;i<=n;i++)
a[i]=-i;
}
for(i=1;i<=n;i++)
cout<<a[i]<<" ";
cout<<endl;
}
return 0;
}