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  1. #include <iostream>
  2. #include <vector>
  3. #include <cmath>
  4. using namespace std;
  5.  
  6. int main() {
  7.     vector<int> nums = {1, 2, 2, 1};
  8.     int k = 1;
  9.  
  10.     int count = 0;
  11.     int n = nums.size();
  12.  
  13.     for(int i = 0; i < n; i++) {
  14.         for(int j = i + 1; j < n; j++) {
  15.             if(abs(nums[i] - nums[j]) == k) {
  16.                 count++;
  17.             }
  18.         }
  19.     }
  20.  
  21.     cout << count << endl;
  22.     return 0;
  23. }
  24.  
Success #stdin #stdout 0.01s 5320KB
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stdin 
Standard input is empty
stdout 
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https://ideone.com/uRc7QU
language:
C++ (gcc 8.3)
created:
9 hours ago
visibility:
public

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