힌트 스테이지

pr/힌트 스테이지/Main.java

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+class Solution {
+    int[] buy;
+    int total;
+    int[][] cost;
+    int[][] hint;
+    int answer;
+    public int solution(int[][] cost, int[][] hint) {
+        answer = Integer.MAX_VALUE;
+        this.cost = cost;
+        this.hint = hint;
+        total = cost.length;
+        buy = new int[total];
+        dfs(0,0);
+        return answer;
+    }
+
+    public void dfs(int stage,int price) {
+        if(stage == total) {
+            answer = Math.min(answer,price);
+            return;
+        }
+
+        int hitBuy = Math.min(buy[stage], total - 1);
+
+         dfs(stage+1, price + cost[stage][hitBuy]);
+
+        if(stage < total  -1) {
+        int[] c = hint[stage];
+        // 힌트권을
+        // 구매하는 경우 
+        int cc = price + cost[stage][hitBuy] + c[0];
+
+        for(int i = 1; i<c.length;i++) {
+            buy[c[i]-1]++;
+        }
+
+        dfs(stage+1, cc);
+        cc -= c[0];
+
+        for(int i = 1; i<c.length;i++) {
+            buy[c[i]-1]--;
+        }
+
+        }
+
+
+    }
+}