Update JuniorProblem.java

src/JuniorProblem.java

@@ -17,18 +17,13 @@ public class JuniorProblem implements ProblemsGenerator {
     do {
       int numCount = RANDOM.nextInt(5) + 1;
       expression = expressionBuilder.generateBasicExpression(numCount);
-      List<Integer> numPositions = expressionBuilder.getNumberPositions(expression);
       
-      if (RANDOM.nextDouble() < 0.8) {
-        int pairs = bracketManager.decideParenthesesPairs(numCount);
-        if (pairs > 0) {
-          expression = bracketManager.addParentheses(expression, pairs, numPositions);
-        }
-      }
+      expression = bracketManager.addNestedParentheses(expression);
       
-      // 添加幂运算并检查添加是否成功
-      expression = powerManager.addPowerOperations(expression, numPositions);
+      List<Integer> numPositions = expressionBuilder.getNumberPositions(expression);
+      expression = powerManager.addPowerOperations(expression, numPositions, null);
       hasPower = expression.contains("^2") || expression.contains("√");
+      
     } while (expressionBuilder.hasDivideByZero(expression) || !hasPower);
     
     return expression;