Запиcь в UTF8.

src/inport/ConversionUtils/Solver.java

@@ -249,7 +249,9 @@ public class Solver {
 
             if (isResultsInOutput) {
                 try (FileWriter res = new FileWriter(solverResults)) {
-                    res.write(output);
+                    for (byte b : output.getBytes("UTF8")) {
+                        res.write(b);
+                    }
                 }
                 interpreter.accept(task, solverResults);
             } else {