func_code_string: #include <bits/stdc++.h>   using namespace std;   #define     mod     1000000007   #define     int      long long    #define     pb      push_back   #define     endl      n    #define     ff      first   #define     ss      second   #define     FIO     ios_base::sync_with_stdio(0);cin.tie(NULL);cout.tie(NULL);   #define     all(x)  (x).begin(),(x).end()   int32_t main()   {         FIO         int t; cin >> t;         while(t--)         {               int n, x, t; cin >> n >> x >> t;               if(x > t) cout << 0 << endl;               else                {                     int a = t/x;                     int ans=0;                     if(a>n)                           ans+= (n*(n-1))/2;                     else                     {                           ans+= (n-a) * a;                           ans+= (a*(a-1))/2;                     }                     cout << ans << endl;               }         }   }