Completed Graph-1. Requesting Review

problem_1.py

@@ -0,0 +1,16 @@
+class Solution:
+    def findJudge(self, n: int, trust: List[List[int]]) -> int:
+        if n == 1:
+            return 1
+
+        indeg = [0] * (n + 1)
+        outdeg = [0] * (n + 1)
+
+        for a, b in trust:
+            outdeg[a] += 1
+            indeg[b] += 1
+
+        for person in range(1, n + 1):
+            if indeg[person] == n - 1 and outdeg[person] == 0:
+                return person
+        return -1

problem_2.py

@@ -0,0 +1,22 @@
+from collections import deque
+def hasPath(source,destiantion, maze):
+    Dir=[(1,0),(0,1),(0,-1),(-1,0)]
+    q=deque()
+    q.append((source))
+    m,n=len(maze),len(maze[0])
+    while(len(q)):
+        cord=q.popleft()
+        maze[cord[0]][cord[1]]=2
+
+        for d in Dir:
+            i,j=cord[0],cord[1]
+            while(-1<i<m and -1<j<n and maze[i][j]!=1):
+                i+=d[0]
+                j+=d[1]
+            i-=d[0]
+            j-=d[1]
+            if maze[i][j]!=2:
+                if i==destiantion[0] and j==destiantion[1]:
+                    return True
+                q.append((i,j))
+    return False