diff --git a/cmd/bin/src/graph.dart b/cmd/bin/src/graph.dart
index 74df1c3..cd8707b 100644
--- a/cmd/bin/src/graph.dart
+++ b/cmd/bin/src/graph.dart
@@ -1,15 +1,15 @@
 import 'dart:io';
 
 class Separators {
-  final String dotToConnections = ": ";
-  final String dotToLength = "|";
-  final String space = " ";
-  final String hasLength = "Взвешенный\n";
-  final String hasNoLength = "НеВзвешенный\n";
-  final String isOriented = "Ориентированный\n";
-  final String isNotOriented = "НеОриентированный\n";
-  final String nL = "\n";
-  final String end = "END";
+  static const String dotToConnections = ": ";
+  static const String dotToLength = "|";
+  static const String space = " ";
+  static const String hasLength = "Взвешенный";
+  static const String hasNoLength = "НеВзвешенный";
+  static const String isOriented = "Ориентированный";
+  static const String isNotOriented = "НеОриентированный";
+  static const String nL = "\n";
+  static const String end = "END";
 
   Separators();
 }
@@ -25,6 +25,7 @@ class Dot {
   String getName() => _name;
   bool hasConnection(int n) => _ln.containsKey(n);
   Map<int, int> getL() => _ln;
+
   int getLength(int x) {
     if (hasConnection(x)) {
       return _ln[x]!;
@@ -53,9 +54,9 @@ class Dot {
   }
 
   //******Constructor******
-  Dot() {
-    _name = "Undefined";
-    num = -1;
+  Dot([String name = "Undefined", int n = -1]) {
+    _name = name;
+    num = n;
     _ln = <int, int>{};
   }
   Dot.fromTwoLists(String name, List<int> num0, List<int> length,
@@ -97,11 +98,9 @@ class Graphs {
   bool _oriented = false; //Ориентированность
 
   //*********************Add************************
-  bool addDot(Dot a) {
+  String? addDot(Dot a) {
     if (getNumByName(a.getName()) != null) {
-      print(
-          "Dot name ${a.getName()} already in use. Change name or use addPath");
-      return false;
+      return ("Dot name \"${a.getName()}\" already in use. Change name or use addPath");
     }
     _amount++;
     a.num = _amount;
@@ -109,7 +108,7 @@ class Graphs {
     _syncNameTable();
     checkDots(false);
     if (!_oriented) _fullFix();
-    return true;
+    return null;
   }
 
   bool addDotFromToLists(String name, List<int> num0, List<int> length,
@@ -129,37 +128,40 @@ class Graphs {
     return true;
   }
 
-  bool addIsolated(String name) {
-    var o = addDot(Dot.fromTwoLists(name, [], []));
+  String? addIsolated(String name) {
+    var res = addDot(Dot.fromTwoLists(name, [], []));
     _syncNameTable();
-    return o;
+    return res;
   }
 
-  bool addPath(int from, int to, [int len = 0]) {
+  String? addPath(int from, int to, [int len = 0]) {
     if (from <= 0 || from > _amount || to <= 0 && to > _amount) {
-      return false;
+      return "Index out of range. Have dots 1..$_amount";
     }
     _dots[from - 1].addPath(to, len);
     if (!_oriented) {
       _dots[to - 1].addPath(from, len);
     }
-    return true;
+    return null;
   }
   //*********************Add************************
 
   //*********Delete*********
-  bool delPath(int from, int to) {
+  String? delPath(int from, int to) {
     if (from <= 0 || from > _amount || to <= 0 && to > _amount) {
-      return false;
+      return "Can't find specified path";
     }
     _dots[from - 1].delPath(to);
     if (!_oriented) {
       _dots[to - 1].delPath(from);
     }
-    return true;
+    return null;
   }
 
-  bool delDot(int inn) {
+  String? delDot(int inn) {
+    if (inn > _amount || inn < 1) {
+      return "Index out of range. Allowed 1..$_amount";
+    }
     List<int> toDel = <int>[];
     for (int i in _dots[inn - 1].getL().keys) {
       toDel.add(i);
@@ -171,7 +173,13 @@ class Graphs {
     _syncNum();
     _syncNameTable();
     _fixAfterDel(inn);
-    return true;
+    return null;
+  }
+
+  void flushData() {
+    _dots = <Dot>[];
+    _amount = 0;
+    _nameTable = <int, String>{};
   }
   //*********Delete*********
 
@@ -241,12 +249,121 @@ class Graphs {
   }
   //******Helper*******
 
+  //*****Setters*******
+  void setName(String name) => _name = name;
+  String? flipUseOrientation() {
+    if (_amount != 0) {
+      return "Can change use of orientation only in empty graph";
+    }
+    _oriented = !_oriented;
+    return null;
+  }
+
+  String? flipUseLength() {
+    if (_amount != 0) {
+      return "Can change use of length only in empty graph";
+    }
+    _useLength = !_useLength;
+    return null;
+  }
+
+  String? replaceDataFromFile(String path) {
+    File file = File(path);
+    List<String> lines = file.readAsLinesSync();
+    if (lines.length < 3) {
+      return "Not enough lines in file";
+    }
+    String name = lines.removeAt(0);
+    bool oriented;
+    switch (lines.removeAt(0)) {
+      case Separators.isOriented:
+        oriented = true;
+        break;
+      case Separators.isNotOriented:
+        oriented = false;
+        break;
+      default:
+        return "Error on parsing \"IsOriented\"";
+    }
+    bool useLength;
+    switch (lines.removeAt(0).trim()) {
+      case Separators.hasLength:
+        useLength = true;
+        break;
+      case Separators.hasNoLength:
+        useLength = false;
+        break;
+      default:
+        return "Error on parsing \"HasLength\"";
+    }
+    List<Dot> dots = <Dot>[];
+    for (var l in lines) {
+      l = l.trimRight();
+      if (l != Separators.end) {
+        var spl = l.split(Separators.space);
+        List<int> dot = <int>[];
+        List<int> len = <int>[];
+        String name = spl.removeAt(0);
+        name = name.substring(0, name.length - 1);
+        for (var splitted in spl) {
+          if (splitted != "") {
+            var dt = splitted.split(Separators.dotToLength);
+            if (dt.length == 2) {
+              int? parsed = int.tryParse(dt[0]);
+              if (parsed == null) {
+                return "Error while parsing file\nin parsing int in \"${dt[0]}\"";
+              }
+              dot.add(parsed);
+              if (useLength) {
+                parsed = int.tryParse(dt[1]);
+                if (parsed == null) {
+                  return "Error while parsing file\nin parsing int in \"${dt[1]}\"";
+                }
+                len.add(parsed);
+              } else {
+                len.add(0);
+              }
+            } else if (dt.length == 1) {
+              int? parsed = int.tryParse(splitted);
+              if (parsed == null) {
+                return "Error while parsing file\nin parsing int in \"$splitted\"";
+              }
+              dot.add(parsed);
+              len.add(0);
+            }
+          }
+        }
+        dots.add(Dot.fromTwoLists(name, dot, len));
+      }
+    }
+    _name = name;
+    _oriented = oriented;
+    _useLength = useLength;
+    _dots = dots;
+    _syncNum();
+    _syncNameTable();
+    if (!_oriented) _fullFix();
+    return null;
+  }
+  //*****Setters*******
+
   //*****Getters*******
-  bool getDoubleSided() => _oriented;
-  bool getUseLength() => _useLength;
+  bool getDoubleSidedBool() => _oriented;
+  String getDoubleSidedStr() {
+    if (_oriented) return Separators.isOriented;
+    return Separators.isNotOriented;
+  }
+
+  bool getUseLengthBool() => _useLength;
+  String getUseLengthStr() {
+    if (_useLength) return Separators.hasLength;
+    return Separators.hasNoLength;
+  }
+
   List<Dot> getDots() => _dots;
   String getName() => _name;
   String? getNameByNum(int n) => _nameTable[n];
+  Map<int, String> getNameTable() => _nameTable;
   int getDotAmount() => _dots.length;
   int? getNumByName(String n) {
     for (var i in _nameTable.keys) {
@@ -282,6 +399,23 @@ class Graphs {
     }
     return out;
   }
+
+  /*List<Dot> getNoRepeatDots() {
+    List<Dot> ret = <Dot>[];
+    for (int i = 0; i < _amount; i++) {
+      ret.add(Dot(_dots[i].getName(), _dots[i].num));
+    }
+    for (int i = 0; i < _amount; i++) {
+      for (int j in _dots[i].getL().keys) {
+        if (!ret[j - 1].hasConnection(i + 1) && !ret[i].hasConnection(j) ||
+            i == j) {
+          var len = _dots[i].getLength(j);
+          ret[i].addPath(j, len);
+        }
+      }
+    }
+    return ret;
+  }*/
   //*****Getters*******
 
   //******Print******
@@ -303,31 +437,34 @@ class Graphs {
   }
 
   void printToFile(String name) {
-    Separators sep = Separators();
     var file = File(name);
     file.writeAsStringSync("$_name\n");
     if (_oriented) {
-      file.writeAsStringSync(sep.isOriented, mode: FileMode.append);
+      file.writeAsStringSync("${Separators.isOriented}\n",
+          mode: FileMode.append);
     } else {
-      file.writeAsStringSync(sep.isNotOriented, mode: FileMode.append);
+      file.writeAsStringSync("${Separators.isNotOriented}\n",
+          mode: FileMode.append);
     }
     if (_useLength) {
-      file.writeAsStringSync(sep.hasLength, mode: FileMode.append);
+      file.writeAsStringSync("${Separators.hasLength}\n",
+          mode: FileMode.append);
     } else {
-      file.writeAsStringSync(sep.hasNoLength, mode: FileMode.append);
+      file.writeAsStringSync("${Separators.hasNoLength}\n",
+          mode: FileMode.append);
     }
     for (int i = 0; i < _amount; i++) {
-      file.writeAsStringSync((i + 1).toString() + sep.dotToConnections,
+      file.writeAsStringSync((i + 1).toString() + Separators.dotToConnections,
           mode: FileMode.append);
       var d = _dots[i].getL();
       for (var j in d.keys) {
         file.writeAsStringSync(
-            j.toString() + sep.dotToLength + d[j].toString() + " ",
+            j.toString() + Separators.dotToLength + d[j].toString() + " ",
             mode: FileMode.append);
       }
-      file.writeAsStringSync(sep.nL, mode: FileMode.append);
+      file.writeAsStringSync(Separators.nL, mode: FileMode.append);
     }
-    file.writeAsStringSync(sep.end, mode: FileMode.append);
+    file.writeAsStringSync(Separators.end, mode: FileMode.append);
   }
   //******Print******
 
@@ -353,22 +490,22 @@ class Graphs {
     if (!_oriented) _fullFix();
   }
   Graphs.fromFile(String path) {
-    Separators sep = Separators();
-    File file = File(path);
+    replaceDataFromFile(path);
+    /*File file = File(path);
     List<String> lines = file.readAsLinesSync();
     _name = lines.removeAt(0);
-    _oriented = lines.removeAt(0) == sep.isOriented.trim();
-    _useLength = lines.removeAt(0) == sep.hasLength.trim();
+    _oriented = lines.removeAt(0) == Separators.isOriented.trim();
+    _useLength = lines.removeAt(0) == Separators.hasLength.trim();
     _dots = <Dot>[];
     for (var l in lines) {
-      if (l != sep.end) {
-        var spl = l.split(sep.space);
+      if (l != Separators.end) {
+        var spl = l.split(Separators.space);
         List<int> dot = <int>[];
         List<int> len = <int>[];
         String name = spl.removeAt(0);
         name = name.substring(0, name.length - 1);
         for (var splitted in spl) {
-          var dt = splitted.split(sep.dotToLength);
+          var dt = splitted.split(Separators.dotToLength);
           if (dt.length == 2) {
             dot.add(int.parse(dt[0]));
             if (_useLength) {
@@ -386,7 +523,7 @@ class Graphs {
     }
     _syncNum();
     _syncNameTable();
-    if (!_oriented) _fullFix();
+    if (!_oriented) _fullFix();*/
   }
   //*******Constructor********
 
@@ -394,14 +531,14 @@ class Graphs {
   Graphs.clone(Graphs a) {
     _name = a.getName();
     _dots = a.getDots();
-    _oriented = a.getDoubleSided();
-    _useLength = a.getUseLength();
+    _oriented = a.getDoubleSidedBool();
+    _useLength = a.getUseLengthBool();
     _amount = _dots.length;
     _syncNameTable();
   }
 
   //************Алгоритмы************
-  bool bfsHasPath(int startDot, int goalDot) {
+  /* bool bfsHasPath(int startDot, int goalDot) {
     // обход в ширину
     startDot--;
     goalDot--;
@@ -428,9 +565,10 @@ class Graphs {
       }
     }
     return false; // Целевой узел недостижим
-  }
+  }*/
 
   List<int>? bfsPath(int startDot, int goalDot) {
+    if (startDot == goalDot) return [startDot];
     //if (!bfsHasPath(startDot, goalDot)) return null;
     startDot--;
     goalDot--;
@@ -470,7 +608,6 @@ class Graphs {
 
     //Восстановим кратчайший путь
     //Для восстановления пути пройдём его в обратном порядке, и развернём.
-
     List<int> path = <int>[];
 
     int cur = goalDot; //текущая вершина пути
@@ -493,21 +630,25 @@ class Graphs {
 
   List<bool>? dfsIterative(int v) {
     v--;
+    //List<int>? pos = <int>[];
     List<bool> label = <bool>[];
     for (int i = 0; i < _amount; i++) {
       label.add(false);
     }
     List<int> stack = <int>[];
     stack.add(v);
+    //pos.add(v);
     while (stack.isNotEmpty) {
       v = stack.removeLast();
       if (!label[v]) {
         label[v] = true;
         for (int i in _dots[v].getL().keys) {
           stack.add(i - 1);
+          //pos.add(i);
         }
       }
     }
+    //print(pos);
     return label;
   }