solve(BOJ): G4_11657_타임머신_kt

src/boj/G4_11657_타임머신.kt

@@ -0,0 +1,54 @@
+package boj
+
+import kotlin.math.min
+
+class BOJ11657() {
+    data class Edge(val start: Int, val end: Int, val weight: Int)
+
+    val INF = Long.MAX_VALUE / 2
+    fun solve() {
+        val (N, M) = readln().split(" ").map { it.toInt() }
+
+        val map = Array(N + 1) { mutableListOf<Edge>() }
+        for (i in 0 until M) {
+            val (start, end, weight) = readln().split(" ").map { it.toInt() }
+            map[start].add(Edge(start, end, weight))
+        }
+
+        val dist = LongArray(N + 1) { INF }
+        dist[1] = 0
+
+        for (i in 2..N) {
+            for (j in 1..N) {
+                if (dist[j] == INF) continue
+                map[j].forEach {
+                    dist[it.end] = min(dist[it.start] + it.weight, dist[it.end])
+                }
+            }
+        }
+
+        for (i in 1..N) {
+            if (dist[i] == INF) continue
+            map[i].forEach {
+                if (dist[it.end] != min(dist[it.start] + it.weight, dist[it.end])) {
+                    println(-1)
+                    return
+                }
+            }
+        }
+
+        with(StringBuilder()) {
+            for (i in 2..N) {
+                if (dist[i] != INF) append(dist[i])
+                else append(-1)
+                append("\n")
+            }
+
+            print(this)
+        }
+    }
+}
+
+fun main() {
+    BOJ11657().solve()
+}