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Cod sursa(job #840392)
#include <iostream>
#include <fstream>
using namespace std;
fstream fin("farfurii.in");
ofstream fout("farfurii.out");
long long n,m,p,i,r;
int main()
{
fin>>n>>m;
long long j=0;
for(i=1;i<=n;i++)
{
p+=i;
if(p>=m)
{
j=i;
break;
}
}
r =((j+1)*j)/2-m;
for(i=1;i<=n-j-1;i++)
fout<<i<<" ";
long long t=n-r;
fout<<t<<" ";
for(i=n;i>=n-j;i--)
if(i!=t) fout<<i<<" ";
return 0;
}