func_code_string: #include <bits/stdc++.h>   using namespace std;   signed main() {     ios_base::sync_with_stdio(false);     cin.tie(0);     cout.tie(0);     long long n, k;     cin >> n >> k;     vector<long long> arr(n);     for (auto& i : arr) cin >> i;     long long l = 0, r = 2, ans = 0;     while (r < n) {       if (arr[r] - arr[l] <= k) {         long long val = r - l - 1;         val = (val * (val + 1)) / 2;         ans += val;         r++;       } else {         l++;       }       if (r == l + 1) r++;     }     cout << ans <<   n ;     return 0;   }   