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  1. #include<iostream>
  2. using namespace std;
  3. void swap (int &a,int &b)
  4. {
  5.     int tmp = a;
  6.     a = b;
  7.     b=tmp;
  8. }
  9. void print(int n[],int l,int r)
  10. {
  11.     if(l==r)
  12.     {
  13.         for(int i=0;i<=l;i++){
  14.             cout<<n[i];
  15.             }
  16.         cout<<endl;
  17.     }
  18.     else  
  19.     {
  20.         for(int i =l;i<=r;i++)
  21.         {
  22.             swap(n[i],n[l]);
  23.             print(n,l+1,r);
  24.             swap(n[i],n[l]);
  25.         }
  26.     } 
  27.  
  28. }
  29. int main()
  30. {
  31.     int n;
  32.     cin>>n;
  33.     int s[n];
  34.     for(int i=0;i<n;i++)
  35.     {
  36.         s[i]=i+1;
  37.     }
  38.     print(s,0,n-1);
  39. }
Success #stdin #stdout 0.01s 5536KB
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https://ideone.com/lJNuVs
language:
C++14 (clang 8.0)
created:
1 year ago
visibility:
public

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