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Cod sursa(job #1825814)

Utilizator aaether14Dinescu Stefan Cristian aaether14 Data 9 decembrie 2016 18:22:41
Problema Farfurii Scor 80
Compilator cpp Status done
Runda Arhiva de probleme Marime 1.39 kb
#include <fstream>
#include <algorithm>


int n, k;
int tree[400004];




void modify(int node, int left, int right, int position, int value)
{

        if (left==right)
        {
                tree[node] = value;
                return;
        }
        int middle = (left+right)>>1;
        if (position <= middle)
                modify(node<<1, left, middle, position, value);
        else
                modify(node<<1|1, middle+1, right, position, value);
        tree[node] = tree[node<<1] + tree[node<<1|1];

}



int query(int node, int left, int right, int value)
{
        if (left==right) return left;
        int middle = (left+right)>>1;
        if (value <= tree[node<<1])
                return query(node<<1, left, middle, value);
        else
                return query(node<<1|1, middle+1, right, value-tree[node<<1]);
}


int main()
{


        std::ifstream fin("farfurii.in");
        std::ofstream fout("farfurii.out");


        fin>>n>>k;
        for (int i = 1; i <= n; ++i)
                modify(1, 1, n, i, 1);


        for (int i = n; i > 0; --i)
        {
                int needed_inversions = std::max(0, k-(i-1)*(i-2)/2);
                k-=needed_inversions;
                int place = query(1, 1, n, needed_inversions+1);
                fout<<place<<" ";
                modify(1, 1, n, place, 0);
        }


        fin.close();
        fout.close();
        return 0;


}