diff --git a/swea/1860.py b/swea/1860.py
new file mode 100644
index 0000000..91eb727
--- /dev/null
+++ b/swea/1860.py
@@ -0,0 +1,35 @@
+from queue import Queue
+t=int(input())
+for tc in range(1,t+1):
+    n,m,k=map(int,input().split())
+    arr=list(map(int,input().split()))
+    q=Queue()
+    arr.sort()
+    for i in arr:
+        q.put(i)
+
+    isPos=True
+    time=1
+    cnt=0
+    last=q.get()
+    while isPos and not(last<time):
+        if time%m==0:
+            cnt+=k
+        while last==time:
+            cnt-=1
+            if q.qsize()>0:
+                last=q.get()
+            else:
+                last=-1
+            if cnt<0:
+                isPos=False
+                break
+        time+=1
+    if last==0:
+        isPos=False
+    isPosStr=""
+    if isPos:
+        isPosStr="Possible"
+    else:
+        isPosStr="Impossible"
+    print("#"+str(tc),isPosStr)