func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     long long int t;     cin >> t;     while (t--) {       long long int n, k, x, y;       cin >> n >> k;       if (n > k) {         x = k * (k + 1);         x = x / 2;         cout << x << endl;       } else {         y = n - 1;         x = y * (y + 1);         x = x / 2;         cout << x + 1 << endl;       }     }     return 0;   }   