fix: improved generator

rod-cutting/src/generator.cpp

@@ -62,9 +62,26 @@ string rnd_test(int i)
 
     int n = rnd.next(min_n, max_n);
     vector<int> nums(n);
-    for (int i = 0; i < n; i++)
+
+    nums[0] = 10;
+    for (int j = 1; j < n; j++)
     {
-        nums[i] = rnd.next(MIN_NI, MAX_NI);
+        int length = j + 1;
+        
+        int choice = rnd.next(0, 100);
+
+        if (choice < 20) {
+            nums[j] = nums[j-1] + rnd.next(1, nums[0] - 1);
+        }
+        else if (choice < 80) {
+            int offset = rnd.next(-2, 3); 
+            nums[j] = nums[j-1] + nums[0];
+        } 
+        else {
+            nums[j] = nums[j-1] + nums[0] + rnd.next(5, 15);
+        }
+
+        nums[j] = min(nums[j], MAX_NI);
     }
     return (output_tc(nums));
 }