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  1. #include<bits/stdc++.h>
  2. using namespace std;
  3. const long long MaxN = 25;
  4. long long n;
  5. long long a[MaxN];
  6. void backtrack(long long pos, long long sum)
  7. {
  8.     if(sum==n)
  9.     {
  10.         for (long long i=1; i<=pos-1; i++)
  11.         {
  12.             cout << a[i] << " ";
  13.         }
  14.         cout << "\n";
  15.         return ;
  16.     }
  17.     for (long long i=1; i<=n-sum; i++)
  18.     {
  19.  
  20.             a[pos]=i;
  21.             backtrack(pos+1,sum+i);
  22.     }
  23. }
  24. int main()
  25. {
  26.     ios_base::sync_with_stdio(0);
  27.     cin.tie(0);
  28.     cin >> n;
  29.     backtrack(1,0);
  30. }
  31.  
Success #stdin #stdout 0s 5320KB
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language:

						
C++14 (gcc 8.3)

					

					

						
created:
								
						
22 hours ago

					

					

						
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