incomplete 18870.c(unknown boj c11-clang runtime error), 28707.py & complete aloha dijkstra3(1238.py, 1504.py, 17940.py)

zeta_python/28707.py

@@ -0,0 +1,24 @@
+import heapq
+
+INF = 10 ** 9 + 1
+
+
+def solve(N, A, Ops):
+    pass
+
+
+if __name__ == '__main__':
+    N = int(input())
+    A = list(map(int, input().split()))
+    M = int(input())
+    Ops: list[list[tuple]] = [[] for _ in range(N)]
+    for _ in range(M):
+        l, r, c = map(int, input().split())
+        Ops[l].append((r, c))
+        Ops[r].append((l, c))
+
+
+"""
+문자가 배열된 상태 S_k를 정의할 수 있음.
+이에 따라 S_0에서 S_k로 가는 distance를 구할 수 있고, 이로 dijkstra를 전개하면 됨.
+"""

zeta_python/completed/1238.py

@@ -0,0 +1,40 @@
+import heapq
+import sys
+
+input = sys.stdin.readline
+
+
+def dijkstra(N, E, start) -> list[int]:
+    heap = []
+    distance = [10 ** 9 + 1 for _ in range(N + 1)]
+    distance[start] = 0
+    heapq.heappush(heap, (0, start,))
+    while heap:
+        cost, now, = heapq.heappop(heap)
+        if distance[now] < cost:
+            continue
+
+        for new, weight in E[now]:
+            new_cost = cost + weight
+            if new_cost < distance[new]:
+                distance[new] = new_cost
+                heapq.heappush(heap, (new_cost, new))
+
+    return distance
+
+
+def solve(N, M, E, iE, X):
+    come = dijkstra(N, E, X)
+    gone = dijkstra(N, iE, X)
+    return max([come[i] + gone[i] for i in range(1, N + 1)])
+
+
+if __name__ == '__main__':
+    N, M, X = map(int, input().split())
+    E = {i: [] for i in range(1, N + 1)}
+    iE = {i: [] for i in range(1, N + 1)}
+    for _ in range(M):
+        A, B, T = map(int, input().split())
+        E[A].append((B, T))
+        iE[B].append((A, T))
+    print(solve(N, M, E, iE, X))

zeta_python/completed/1504.py

@@ -0,0 +1,47 @@
+import heapq
+import sys
+
+input = sys.stdin.readline
+
+
+def dijkstra(N, E, start) -> list[int]:
+    heap = []
+    distance = [10 ** 9 + 1 for _ in range(N + 1)]
+    distance[start] = 0
+    heapq.heappush(heap, (0, start,))
+    while heap:
+        cost, now, = heapq.heappop(heap)
+        if distance[now] < cost:
+            continue
+
+        for new, weight in E[now]:
+            new_cost = cost + weight
+            if new_cost < distance[new]:
+                distance[new] = new_cost
+                heapq.heappush(heap, (new_cost, new))
+
+    return distance
+
+
+def solve(N, E, v1, v2) -> int:
+    heap = []
+    distance_from_v1 = dijkstra(N, E, v1, )
+    distance_from_v2 = dijkstra(N, E, v2, )
+    ret = min(
+        (sum((distance_from_v1[1], distance_from_v1[v2], distance_from_v2[N])),
+         sum((distance_from_v2[1], distance_from_v2[v1], distance_from_v1[N])))
+    )
+    return ret if ret < 10 ** 9 + 1 else -1
+
+
+if __name__ == '__main__':
+    N, e = map(int, input().split())
+    E = {}
+    for i in range(1, N + 1):
+        E[i] = []
+    for _ in range(e):
+        a, b, c = map(int, input().split())
+        E[a].append((b, c))
+        E[b].append((a, c))
+    v1, v2 = map(int, input().split())
+    print(solve(N, E, v1, v2))

zeta_python/completed/17940.py

@@ -0,0 +1,44 @@
+import heapq
+import sys
+
+input = sys.stdin.readline
+
+INF = 10 ** 9 + 1
+
+
+def dijkstra(N, V, E, start) -> list[int]:
+    heap = []
+    distance = [INF*INF for _ in range(N)]
+    distance[start] = 0
+    heapq.heappush(heap, (0, start,))
+    while heap:
+        cost, now, = heapq.heappop(heap)
+        if distance[now] < cost:
+            continue
+
+        for new, weight in E[now]:
+            new_cost = cost + weight
+            if V[new] != V[now]:
+                new_cost += INF
+            if new_cost < distance[new]:
+                distance[new] = new_cost
+                heapq.heappush(heap, (new_cost, new))
+
+    return distance
+
+
+def solve(N, M, V, E):
+    distance = dijkstra(N, V, E, 0)
+    return distance[M] // INF, distance[M] % INF
+
+
+if __name__ == '__main__':
+    N, M = map(int, input().split())
+    V = [int(input()) for _ in range(N)]
+    E = [[] for i in range(N)]
+    for i in range(N):
+        for j, w in enumerate(map(int, input().split())):
+            if w != 0:
+                E[i].append((j, w))
+
+    print(*solve(N, M, V, E))