Cod sursa(job #2787557)

Utilizator db_123Balaban David db_123 Data 23 octombrie 2021 17:58:09
Problema Loto Scor 5
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 2.17 kb
#include <fstream>
#include <algorithm>


using namespace std;

ifstream cin("loto.in");
ofstream cout("loto.out");

int   n,sum;
int   v[101];
int   frecv[101]={0};
bool  visited[101]={0};
bool  gata = false;

const int   TOTAL = 6;
int currentSum=0;
int currentCount=0;

bool isOK(int i)
{
    if (currentCount < TOTAL && (currentSum + v[i] <= sum))
        return true;
    return false;
}
bool isDone()
{
    if(currentCount == TOTAL && currentSum == sum)
        return true;
    return false;
}
void display()
{
    for(int i = 0 ; i < n ; i++)
    {
        while(frecv[i]>0)
        {
            cout << v[i] <<" ";
            frecv[i]--;
        }
    }
}
void back()
{
    /// base condition
    if(isDone() && !gata)
    {
        gata = true;
        display();
        return;
    }


    /// recursive function
    for(int i = 0 ; i < n ; i++)
    {
        if ( isOK(i))
        {
            frecv[i]++;
            currentCount++;
            currentSum+=v[i];
            back();
            frecv[i]--;
            currentCount--;
            currentSum-=v[i];
        }
    }
}

int main()
{
    cin>>n>>sum;
    for(int i =0 ; i < n ; i++)
        cin>>v[i];

    sort(v,v+n);

    //back();

    ///take first element six times
    frecv[0] = 6;
    currentCount = 6;
    currentSum = v[0]*frecv[0];
    int i = 1;
    int smallest = 0,bigger =0;

    while(currentSum != sum && currentCount == TOTAL )
    {
        /// increase sum
        ///     remove smallest element
        for(int j = 0 ; j < n-1 ; j ++)
        {
            if(frecv[j]>0)
            {
                smallest = j;
                frecv[j]--;
                currentSum -=v[j];
                currentCount--;
                break;
            }
        }

        ///     add a bigger element
        for(int j = smallest+1 ; j < n ; j ++)
        {
            bigger = j;
            frecv[j]++;
            currentSum +=v[j];
            currentCount++;
            break;
        }
    }

    if(currentSum != sum)
        cout<<"-1";
    else
    {
        display();
    }

    return 0;
}