init

3F.py

@@ -0,0 +1,37 @@
+import sys
+data = sys.stdin.read().split()
+if not data:
+    exit()
+n = int(data[0])
+m = int(data[1])
+U = [0] * m
+V = [0] * m
+W = [0] * m
+idx = 2
+for i in range(m):
+    U[i] = int(data[idx])
+    V[i] = int(data[idx+1])
+    W[i] = int(data[idx+2])
+    idx += 3
+INF = 10**15
+D = [INF] * (n + 1)
+D[1] = 0
+for _ in range(n - 1):
+    any_relaxed = False
+    for i in range(m):
+        u = U[i]
+        if D[u] != INF:
+            v = V[i]
+            cost = D[u] + W[i]
+            if cost < D[v]:
+                D[v] = cost
+                any_relaxed = True
+    if not any_relaxed:
+        break
+ans = []
+for i in range(1, n + 1):
+    if D[i] == INF:
+        ans.append(30000)
+    else:
+        ans.append(D[i])
+print(*ans)