Merge pull request #3083 from benmak11/2050

sujal-goswami · web-flow · commit dbae42b8968c · 2023-10-19T22:27:30.000+05:30
Create 2050-parallel-courses-iii.java
diff --git a/java/2050-parallel-courses-iii.java b/java/2050-parallel-courses-iii.java
@@ -0,0 +1,32 @@
+public class Solution {
+    public int minimumTime(int n, int[][] relations, int[] time) {
+        Map<Integer, List<Integer>> adj = new HashMap<>();
+        for (int[] relation : relations) {
+            int src = relation[0];
+            int dst = relation[1];
+            adj.putIfAbsent(src, new ArrayList<>());
+            adj.get(src).add(dst);
+        }
+
+        Map<Integer, Integer> maxTime = new HashMap<>();
+
+        for (int i = 1; i <= n; i++) {
+            dfs(i, time, adj, maxTime);
+        }
+
+        return maxTime.values().stream().max(Integer::compareTo).get();
+    }
+
+    private int dfs(int src, int[] time, Map<Integer, List<Integer>> adj, Map<Integer, Integer> maxTime) {
+        if (maxTime.containsKey(src)) {
+            return maxTime.get(src);
+        }
+
+        int res = time[src - 1];
+        for (int nei : adj.getOrDefault(src, new ArrayList<>())) {
+            res = Math.max(res, time[src - 1] + dfs(nei, time, adj, maxTime));
+        }
+        maxTime.put(src, res);
+        return res;
+    }
+}
