Cod sursa(job #2282254)

Utilizator FunnyStockyMihnea Andreescu FunnyStocky Data 13 noiembrie 2018 15:30:35
Problema Farfurii Scor 80
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 2.11 kb
#include <fstream>

using namespace std;

ifstream fin("farfurii.in");

const int N=100000+5;

int n;
long long cnt,lft,x;
int vi;
int aib[N];

class OutParser {
private:
    FILE *fout;
    char *buff;
    int sp;

    void write_ch(char ch) {
        if (sp == 70000) {
            fwrite(buff, 1, 70000, fout);
            sp = 0;
            buff[sp++] = ch;
        } else {
            buff[sp++] = ch;
        }
    }


public:
    OutParser(const char* name) {
        fout = fopen(name, "w");
        buff = new char[70000]();
        sp = 0;
    }
    ~OutParser() {
        fwrite(buff, 1, sp, fout);
        fclose(fout);
    }

    OutParser& operator << (int vu32) {
        if (vu32 <= 9) {
            write_ch(vu32 + '0');
        } else {
            (*this) << (vu32 / 10);
            write_ch(vu32 % 10 + '0');
        }
        return *this;
    }

    OutParser& operator << (long long vu64) {
        if (vu64 <= 9) {
            write_ch(vu64 + '0');
        } else {
            (*this) << (vu64 / 10);
            write_ch(vu64 % 10 + '0');
        }
        return *this;
    }

    OutParser& operator << (char ch) {
        write_ch(ch);
        return *this;
    }
    OutParser& operator << (const char *ch) {
        while (*ch) {
            write_ch(*ch);
            ++ch;
        }
        return *this;
    }
};

int main()
{
    OutParser fout("farfurii.out");
    fin>>n>>cnt;
    for(register int i=1;i<=n;i++)
    {
        lft=n-i;
        x=lft*(lft-1)/2;
        if(cnt<=x)
        {
            vi=0;
        }
        else
        {
            vi=cnt-x;
        }
        cnt-=vi;
        vi++;
        register int r=0,pas=(1<<16);
        register int now=0;
        while(pas)
        {
            if(r+pas<=n && r+pas+now+aib[r+pas]<vi)
            {
                r+=pas;
                now+=aib[r];
            }
            pas>>=1;
        }
        r++;
        for(register int j=r;j<=n;j+=j&(-j))
        {
            aib[j]--;
        }
        fout<<r<<" ";
    }
    return 0;
}