diff --git a/hw05_parallel_execution/.sync b/hw05_parallel_execution/.sync
deleted file mode 100644
index e69de29..0000000
diff --git a/hw05_parallel_execution/go.mod b/hw05_parallel_execution/go.mod
index 957e326..dc56376 100644
--- a/hw05_parallel_execution/go.mod
+++ b/hw05_parallel_execution/go.mod
@@ -1,4 +1,4 @@
-module github.com/fixme_my_friend/hw05_parallel_execution
+module github.com/sofiiakulish/hw05_parallel_execution
 
 go 1.16
 
@@ -8,6 +8,5 @@ require (
 	go.uber.org/goleak v1.1.10
 	golang.org/x/lint v0.0.0-20201208152925-83fdc39ff7b5 // indirect
 	golang.org/x/tools v0.1.0 // indirect
-	gopkg.in/yaml.v2 v2.4.0 // indirect
 	gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b // indirect
 )
diff --git a/hw05_parallel_execution/go.sum b/hw05_parallel_execution/go.sum
index 73d49d2..9ef2607 100644
--- a/hw05_parallel_execution/go.sum
+++ b/hw05_parallel_execution/go.sum
@@ -1,4 +1,3 @@
-github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
@@ -11,38 +10,29 @@ github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZb
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
-github.com/stretchr/testify v1.5.1 h1:nOGnQDM7FYENwehXlg/kFVnos3rEvtKTjRvOWSzb6H4=
-github.com/stretchr/testify v1.5.1/go.mod h1:5W2xD1RspED5o8YsWQXVCued0rvSQ+mT+I5cxcmMvtA=
 github.com/stretchr/testify v1.7.0 h1:nwc3DEeHmmLAfoZucVR881uASk0Mfjw8xYJ99tb5CcY=
 github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
-github.com/yuin/goldmark v1.1.27/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
 github.com/yuin/goldmark v1.2.1/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
-go.uber.org/goleak v1.0.0 h1:qsup4IcBdlmsnGfqyLl4Ntn3C2XCCuKAE7DwHpScyUo=
-go.uber.org/goleak v1.0.0/go.mod h1:8a7PlsEVH3e/a/GLqe5IIrQx6GzcnRmZEufDUTk4A7A=
 go.uber.org/goleak v1.1.10 h1:z+mqJhf6ss6BSfSM671tgKyZBFPTTJM+HLxnhPC3wu0=
 go.uber.org/goleak v1.1.10/go.mod h1:8a7PlsEVH3e/a/GLqe5IIrQx6GzcnRmZEufDUTk4A7A=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
 golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
 golang.org/x/lint v0.0.0-20190930215403-16217165b5de/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
-golang.org/x/lint v0.0.0-20200302205851-738671d3881b h1:Wh+f8QHJXR411sJR8/vRBTZ7YapZaRvUcLFFJhusH0k=
-golang.org/x/lint v0.0.0-20200302205851-738671d3881b/go.mod h1:3xt1FjdF8hUf6vQPIChWIBhFzV8gjjsPE/fR3IyQdNY=
 golang.org/x/lint v0.0.0-20201208152925-83fdc39ff7b5 h1:2M3HP5CCK1Si9FQhwnzYhXdG6DXeebvUHFpre8QvbyI=
 golang.org/x/lint v0.0.0-20201208152925-83fdc39ff7b5/go.mod h1:3xt1FjdF8hUf6vQPIChWIBhFzV8gjjsPE/fR3IyQdNY=
 golang.org/x/mod v0.1.1-0.20191105210325-c90efee705ee/go.mod h1:QqPTAvyqsEbceGzBzNggFXnrqF1CaUcvgkdR5Ot7KZg=
-golang.org/x/mod v0.2.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/mod v0.3.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/net v0.0.0-20190311183353-d8887717615a/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
 golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
 golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
-golang.org/x/net v0.0.0-20200226121028-0de0cce0169b/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20201021035429-f5854403a974/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
 golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210119212857-b64e53b001e4 h1:myAQVi0cGEoqQVR5POX+8RR2mrocKqNN1hmeMqhX27k=
 golang.org/x/sys v0.0.0-20210119212857-b64e53b001e4/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
@@ -51,21 +41,15 @@ golang.org/x/tools v0.0.0-20190311212946-11955173bddd/go.mod h1:LCzVGOaR6xXOjkQ3
 golang.org/x/tools v0.0.0-20191108193012-7d206e10da11/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20200130002326-2f3ba24bd6e7/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
-golang.org/x/tools v0.0.0-20200426102838-f3a5411a4c3b h1:zSzQJAznWxAh9fZxiPy2FZo+ZZEYoYFYYDYdOrU7AaM=
-golang.org/x/tools v0.0.0-20200426102838-f3a5411a4c3b/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE=
 golang.org/x/tools v0.1.0 h1:po9/4sTYwZU9lPhi1tOrb4hCv3qrhiQ77LZfGa2OjwY=
 golang.org/x/tools v0.1.0/go.mod h1:xkSsbof2nBLbhDlRMhhhyNLN/zl3eTqcnHD5viDpcZ0=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
-golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 h1:qIbj1fsPNlZgppZ+VLlY7N33q108Sa+fhmuc+sWQYwY=
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/yaml.v2 v2.2.2 h1:ZCJp+EgiOT7lHqUV2J862kp8Qj64Jo6az82+3Td9dZw=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
-gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
-gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b h1:h8qDotaEPuJATrMmW04NCwg7v22aHH28wwpauUhK9Oo=
 gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
diff --git a/hw05_parallel_execution/run.go b/hw05_parallel_execution/run.go
index 9e3193f..9ec6d62 100644
--- a/hw05_parallel_execution/run.go
+++ b/hw05_parallel_execution/run.go
@@ -2,6 +2,7 @@ package hw05parallelexecution
 
 import (
 	"errors"
+	"sync"
 )
 
 var ErrErrorsLimitExceeded = errors.New("errors limit exceeded")
@@ -10,6 +11,35 @@ type Task func() error
 
 // Run starts tasks in n goroutines and stops its work when receiving m errors from tasks.
 func Run(tasks []Task, n, m int) error {
-	// Place your code here.
+	var wg sync.WaitGroup
+
+	goroutines := make(chan int, n)
+	errors := make(chan error, len(tasks))
+
+	errorCount := 0
+
+	for k, t := range tasks {
+		goroutines <- k
+		wg.Add(1)
+		go func(t Task, goroutines <-chan int) {
+			defer wg.Done()
+			result := t()
+			if result != nil {
+				errors <- result
+			}
+			<-goroutines
+		}(t, goroutines)
+		select {
+		case <-errors:
+			errorCount++
+			if m > 0 && errorCount >= m {
+				return ErrErrorsLimitExceeded
+			}
+			default:
+		}
+	}
+
+	wg.Wait()
+
 	return nil
 }
diff --git a/hw05_parallel_execution/run_test.go b/hw05_parallel_execution/run_test.go
index a7069d7..134fa38 100644
--- a/hw05_parallel_execution/run_test.go
+++ b/hw05_parallel_execution/run_test.go
@@ -7,6 +7,7 @@ import (
 	"sync/atomic"
 	"testing"
 	"time"
+	"sync"
 
 	"github.com/stretchr/testify/require"
 	"go.uber.org/goleak"
@@ -20,12 +21,15 @@ func TestRun(t *testing.T) {
 		tasks := make([]Task, 0, tasksCount)
 
 		var runTasksCount int32
+		var mu sync.Mutex
 
 		for i := 0; i < tasksCount; i++ {
 			err := fmt.Errorf("error from task %d", i)
 			tasks = append(tasks, func() error {
 				time.Sleep(time.Millisecond * time.Duration(rand.Intn(100)))
+				mu.Lock()
 				atomic.AddInt32(&runTasksCount, 1)
+				mu.Unlock()
 				return err
 			})
 		}
@@ -35,7 +39,9 @@ func TestRun(t *testing.T) {
 		err := Run(tasks, workersCount, maxErrorsCount)
 
 		require.Truef(t, errors.Is(err, ErrErrorsLimitExceeded), "actual err - %v", err)
+		mu.Lock()
 		require.LessOrEqual(t, runTasksCount, int32(workersCount+maxErrorsCount), "extra tasks were started")
+		mu.Unlock()
 	})
 
 	t.Run("tasks without errors", func(t *testing.T) {
@@ -44,6 +50,7 @@ func TestRun(t *testing.T) {
 
 		var runTasksCount int32
 		var sumTime time.Duration
+		var mu sync.Mutex
 
 		for i := 0; i < tasksCount; i++ {
 			taskSleep := time.Millisecond * time.Duration(rand.Intn(100))
@@ -51,7 +58,9 @@ func TestRun(t *testing.T) {
 
 			tasks = append(tasks, func() error {
 				time.Sleep(taskSleep)
+				mu.Lock()
 				atomic.AddInt32(&runTasksCount, 1)
+				mu.Unlock()
 				return nil
 			})
 		}
@@ -67,4 +76,30 @@ func TestRun(t *testing.T) {
 		require.Equal(t, runTasksCount, int32(tasksCount), "not all tasks were completed")
 		require.LessOrEqual(t, int64(elapsedTime), int64(sumTime/2), "tasks were run sequentially?")
 	})
+
+	t.Run("negative error count", func(t *testing.T) {
+			tasksCount := 50
+    		tasks := make([]Task, 0, tasksCount)
+
+    		var runTasksCount int32
+    		var mu sync.Mutex
+
+    		for i := 0; i < tasksCount; i++ {
+    			err := fmt.Errorf("error from task %d", i)
+    			tasks = append(tasks, func() error {
+    				time.Sleep(time.Millisecond * time.Duration(rand.Intn(100)))
+    				mu.Lock()
+    				atomic.AddInt32(&runTasksCount, 1)
+    				mu.Unlock()
+    				return err
+    			})
+    		}
+
+    		workersCount := 10
+    		maxErrorsCount := -23
+    		res := Run(tasks, workersCount, maxErrorsCount)
+
+    		require.Equal(t, nil, res, "errors were thrown")
+    		require.Equal(t, runTasksCount, int32(tasksCount), "not all tasks were completed")
+	})
 }