Cod sursa(job #3183897)

Utilizator leelcheeseCiovnicu Denis leelcheese Data 13 decembrie 2023 17:47:26
Problema Schi Scor 100
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 1.37 kb
#include <bits/stdc++.h>
using namespace std;

/**
8
a   = 1 1 3 4 4 2 1 3
cls = 7     6       3

cls[i]=j : j a iesit al i-lea in clasament

      1 2 3 4 5 6 7 8
aib = 0 1 0 1 1 1 1 1

7 2 8 6 1 3 5 4
*/
ifstream fin("schi.in");
ofstream fout("schi.out");
int aib[100003], n, a[100003], cls[100003];

void Update(int p, int y)
{
    while (p <= n)
    {
        aib[p] += y;
        p += (p & (-p));
    }
}

int Query(int p)
{
    int suma = 0;
    while (p > 0)
    {
        suma += aib[p];
        p -= (p & (-p));
    }
    return suma;
}

/// cauta binar cea mai din stanga pozitie p
/// in care a[1]+...+a[p] = x
/// daca p nu exista returnam -1
/// O(log^2 n)
int CautBin(int x)
{
    int st, dr, mij, p, suma;
    st = 1; dr = n; p = -1;
    while (st <= dr)
    {
        mij = (st + dr) / 2;
        suma = Query(mij);
        if (suma == x)
        {
            p = mij;
            dr = mij - 1;
        }
        else if (suma < x) st = mij + 1;
        else dr = mij - 1;
    }
    return p;
}

int main()
{
    int i, p;
    fin >> n;
    for (i = 1; i <= n; i++)
    {
        fin >> a[i];
        Update(i, 1);
    }
    for (i = n; i >= 1; i--)
    {
        p = CautBin(a[i]);
        cls[p] = i;
        Update(p, -1);
    }
    for (i = 1; i <= n; i++)
        fout << cls[i] << "\n";
    return 0;
}