[20251120] BOJ / G4 / 물통

Ukj0ng/202511/20 BOJ G4 물통.md

@@ -0,0 +1,99 @@
+```
+import java.io.*;
+import java.util.*;
+
+public class Main {
+    private static final BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+    private static final BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));
+    private static Set<String> visited;
+    private static TreeSet<Integer> set;
+    private static int A, B, C;
+    public static void main(String[] args) throws IOException {
+        init();
+        BFS();
+
+        for (Integer e : set) {
+            bw.write(e + " ");
+        }
+
+        bw.flush();
+        bw.close();
+        br.close();
+    }
+
+    private static void init() throws IOException {
+        StringTokenizer st = new StringTokenizer(br.readLine());
+        A = Integer.parseInt(st.nextToken());
+        B = Integer.parseInt(st.nextToken());
+        C = Integer.parseInt(st.nextToken());
+
+        visited = new HashSet<>();
+        set = new TreeSet<>();
+
+
+    }
+
+    private static void BFS() {
+        Queue<int[]> q = new ArrayDeque<>();
+        visited.add(0 + "," + 0 + "," + C);
+        q.add(new int[]{0, 0, C});
+
+        while (!q.isEmpty()) {
+            int[] current = q.poll();
+
+            if (current[0] == 0) {
+                set.add(current[2]);
+            }
+
+            for (int i = 0; i < 3; i++) {
+                if (i == 0 && current[0] > 0) {
+                    int nB = Math.min(B, current[0] + current[1]);
+                    int nA = current[0] - (nB - current[1]);
+
+                    if (!visited.contains(nA + "," + nB + "," + current[2])) {
+                        visited.add(nA + "," + nB + "," + current[2]);
+                        q.add(new int[]{nA, nB, current[2]});
+                    }
+
+                    int nC = Math.min(C, current[0] + current[2]);
+                    nA = current[0] - (nC - current[2]);
+                    if (!visited.contains(nA + "," + current[1] + "," + nC)) {
+                        visited.add(nA + "," + current[1] + "," + nC);
+                        q.add(new int[]{nA, current[1], nC});
+                    }
+                } else if (i == 1 && current[1] > 0) {
+                    int nA = Math.min(A, current[0] + current[1]);
+                    int nB = current[1] - (nA - current[0]);
+
+                    if (!visited.contains(nA + "," + nB + "," + current[2])) {
+                        visited.add(nA + "," + nB + "," + current[2]);
+                        q.add(new int[]{nA, nB, current[2]});
+                    }
+
+                    int nC = Math.min(C, current[1] + current[2]);
+                    nB = current[1] - (nC - current[2]);
+                    if (!visited.contains(current[0] + "," + nB + "," + nC)) {
+                        visited.add(current[0] + "," + nB + "," + nC);
+                        q.add(new int[]{current[0], nB, nC});
+                    }
+                } else if (i == 2 && current[2] > 0) {
+                    int nA = Math.min(A, current[0] + current[2]);
+                    int nC = current[2] - (nA - current[0]);
+
+                    if (!visited.contains(nA + "," + current[1] + "," + nC)) {
+                        visited.add(nA + "," + current[1] + "," + nC);
+                        q.add(new int[]{nA, current[1], nC});
+                    }
+
+                    int nB = Math.min(B, current[1] + current[2]);
+                    nC = current[2] - (nB - current[1]);
+                    if (!visited.contains(current[0] + "," + nB + "," + nC)) {
+                        visited.add(current[0] + "," + nB + "," + nC);
+                        q.add(new int[]{current[0], nB, nC});
+                    }
+                }
+            }
+        }
+    }
+}
+```