Find permutations

Find all permutations of a string

void permute(string a, int l, int r)  
{  
    // Base case  
    if (l == r)  
        cout<<a<<endl;  
    else
    {  
        // Permutations made  
        for (int i = l; i <= r; i++)  
        {  
  
            // Swapping done  
            swap(a[l], a[i]);  
  
            // Recursion called  
            permute(a, l+1, r);  
  
            //backtrack  
            swap(a[l], a[i]);  
        }  
    }  
}

Find permutations

void find_permutations(vector<int> &array, size_t index, vector<int> current_perm, vector<vector<int>> &res){
    if(index == array.size()) 
        res.push_back(current_perm);
    else{
        for(size_t i = 0; i <= current_perm.size(); ++i){
            vector<int> new_perm(current_perm.begin(), current_perm.end());
            new_perm.insert(new_perm.begin()+i, array[index]);
            find_permutations(array, index+1, new_perm, res);
        }
    }
}

Source: practice.geeksforgeeks.org

Similar codes

35 votes220 views3 answers
Hello c++
C++
8 votes216 views6 answers
C++ while loop
C++
0 vote227 views1 answer
Lnk2001 unresolved external symbol __imp_PlaySoundA
C++
0 vote237 views1 answer
Convert string to wide string
C++
0 vote228 views1 answer
C ++ split_string
C++
0 vote226 views1 answer
How to write int variable c++
C++
20 votes227 views5 answers
Cin.getline
C++
1 vote213 views1 answer
Cpp code for euclids GCD
C++
0 vote224 views1 answer
Bits/stdc++.h in c++
C++
0 vote234 views1 answer
Amusia
C++