Merge pull request neetcode-gh#1935 from kkr2/feat/0332-reconstruct-i…

…tenerary.go

Create 0332-reconstruct-itenerary.go

go/0332-reconstruct-itenerary.go

@@ -0,0 +1,48 @@
+func findItinerary(tickets [][]string) []string {
+
+ adjMap := make(map[string][]string)
+
+ for i := 0; i < len(tickets); i++ {
+ adjMap[tickets[i][0]] = append(adjMap[tickets[i][0]], tickets[i][1])
+ }
+
+ for i := 0; i < len(tickets); i++ {
+ sort.Strings(adjMap[tickets[i][0]])
+ }
+
+ res := []string{"JFK"}
+
+ var dfs func(source string) bool
+
+ dfs = func(src string) bool {
+
+ if len(res) == len(tickets)+1 {
+ return true
+ }
+
+ if _, ok := adjMap[src]; !ok {
+ return false
+ }
+
+ destinationList := adjMap[src]
+
+ for i, destination := range destinationList {
+
+ adjMap[src] = append(adjMap[src][:i], adjMap[src][i+1:]...)
+
+ res = append(res, destination)
+ if dfs(destination) == true {
+ return true
+ }
+ adjMap[src] = append(adjMap[src][:i+1], adjMap[src][i:]...)
+ adjMap[src][i] = destination
+
+ res = res[:len(res)-1]
+ }
+
+ return false
+ }
+
+ dfs("JFK")
+ return res
+}