create dev channel

zeta/py/completed/15565.py

@@ -0,0 +1,10 @@
+if __name__ == "__main__":
+    N, K = map(int, input().split())
+    L = list(map(int, input().split()))
+    M = []
+
+    for i in range(N):
+        if L[i] == 1:
+            M.append(i)
+
+    print(min((M[i + K - 1] - M[i] + 1 for i in range(len(M) - K + 1)), default=-1))