Cod sursa(job #3276781)

Utilizator tedicTheodor Ciobanu tedic Data 14 februarie 2025 17:49:25
Problema Generare de permutari Scor 0
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.83 kb
#include <fstream>
#include <vector>
#include <algorithm>

using namespace std;
ifstream cin("ppermutari.in");
ofstream cout("ppermutari.out");
vector<int>v;
vector<int>v2[50005];
int n,nr=0;
bool luat[10];
void backtracking(int val)
{
    if(val==n+1)
    {
        if(v.size()!=n)
            return ;
        v2[nr]=v;
        nr++;
        return ;
    }
    backtracking(val+1);
    for(int i=1; i<=n; i++)
    {
        if(!luat[i])
        {
            v.push_back(i);
            luat[i]=1;
            backtracking(val+1);
            luat[i]=0;
            v.pop_back();
        }
    }
}
int main()
{
    cin>>n;
    backtracking(1);
    sort(v2,v2+nr);
    for(int i=0; i<nr; i++)
    {
        for(int j=0; j<n; j++)
            cout<<v2[i][j]<<" ";
        cout<<'\n';
    }
    return 0;
}