ADD file via upload

src/SeniorProblem.java

@@ -0,0 +1,21 @@
+import java.util.Random;
+
+public class SeniorProblem implements ProblemsGenerator{
+  private static final Random RANDOM = new Random();
+  private static final String[] FUNCS = {"sin", "cos", "tan"};
+  
+  @Override
+  public String generate() {
+    int count = RANDOM.nextInt(5) + 1; // 1~5个数
+    StringBuilder sb = new StringBuilder();
+    for (int i = 0; i < count; i++) {
+      int angle = RANDOM.nextInt(90) + 1;
+      String func = FUNCS[RANDOM.nextInt(FUNCS.length)];
+      sb.append(func).append("(").append(angle).append("°)");
+      if (i < count - 1) {
+        sb.append(" + ");
+      }
+    }
+    return sb.toString();
+  }
+}