diff --git a/problems/problems_2844/solution.go b/problems/problems_2844/solution.go
index 882d2517..862cc496 100644
--- a/problems/problems_2844/solution.go
+++ b/problems/problems_2844/solution.go
@@ -7,7 +7,24 @@ import (
 )
 
 func minimumOperations(num string) int {
-
+	n, zero := len(num), false
+	for i, five := n-1, false; i >= 0; i-- {
+		c := num[i]
+		if zero && (c == '0' || c == '5') ||
+			five && (c == '2' || c == '7') {
+			return n - i - 2
+		}
+		if c == '0' {
+			zero = true
+		}
+		if c == '5' {
+			five = true
+		}
+	}
+	if zero {
+		return n - 1
+	}
+	return n
 }
 
 func Solve(inputJsonValues string) interface{} {
diff --git a/problems/problems_49/solution.go b/problems/problems_49/solution.go
index b39ebee1..1dbde3e0 100644
--- a/problems/problems_49/solution.go
+++ b/problems/problems_49/solution.go
@@ -3,11 +3,23 @@ package problem49
 import (
 	"encoding/json"
 	"log"
+	"sort"
 	"strings"
 )
 
 func groupAnagrams(strs []string) [][]string {
-
+	group := map[string][]string{}
+	for _, str := range strs {
+		s := []byte(str)
+		sort.Slice(s, func(i, j int) bool { return s[i] < s[j] })
+		sortedStr := string(s)
+		group[sortedStr] = append(group[sortedStr], str)
+	}
+	ans := make([][]string, 0, len(group))
+	for _, v := range group {
+		ans = append(ans, v)
+	}
+	return ans
 }
 
 func Solve(inputJsonValues string) interface{} {