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  1. #include <iostream>
  2. #include <vector>
  3.  
  4. using namespace std;
  5.  
  6. void findBoth(int i, const vector<int>& a, int tar, vector<int>&ans) {
  7.     // Base Case
  8.     if (i == a.size()) {
  9.         return;
  10.     }
  11.  
  12.     if (a[i] == tar) {
  13.         // Set first only if it hasn't been set yet
  14.        ans.push_back(i);
  15.     }
  16.  
  17.     // Recurse to next index
  18.     findBoth(i + 1, a, tar,ans);
  19. }
  20.  
  21. int main() {
  22.     int n, tar;
  23.     cin >> n >> tar;
  24.  
  25.     vector<int> a(n);
  26.     for (int i = 0; i < n; i++) {
  27.         cin >> a[i];
  28.     }
  29.      vector<int>ans;
  30.  
  31.     findBoth(0, a, tar, ans);
  32.     for(int x : ans){
  33.     	cout<<x<<" ";
  34.     }
  35.  
  36.  
  37.     return 0;
  38. }
Success #stdin #stdout 0.01s 5292KB
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https://ideone.com/GZp6QM
language:
C++14 (gcc 8.3)
created:
2 days ago
visibility:
public

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