create dev channel

zeta/py/completed/2623.py

@@ -0,0 +1,43 @@
+import sys
+
+input = sys.stdin.readline
+
+
+class TopoSort:
+    def __init__(self, N, E):
+        self.__N = N
+        self.__edges = E
+        self.__targets = [[] for _ in range(self.__N)]
+        self.__indeg = [0] * self.__N
+        for u, v in self.__edges:
+            self.__indeg[v] += 1
+            self.__targets[u].append(v)
+
+    def sort(self) -> list[int]:
+        indeg = self.__indeg.copy()
+        Q = []
+        for i, d in enumerate(indeg):
+            if d == 0:
+                Q.append(i)
+        line = []
+        while Q:
+            u = Q.pop()
+            line.append(u)
+            for v in self.__targets[u]:
+                indeg[v] -= 1
+                if indeg[v] == 0:
+                    Q.append(v)
+        if len(line) != N:
+            return [-1]
+        return line
+
+
+if __name__ == "__main__":
+    N, M = map(int, input().split())
+    E = []
+    for _ in range(M):
+        order = list(map(lambda x: int(x) - 1, input().split()))
+        for u, v in zip(order[1:-1], order[2:]):
+            E.append((u, v))
+    solver = TopoSort(N, E)
+    print("\n".join(map(lambda x: str(int(x) + 1), solver.sort())))