BISHI53 [P1080] 国王游戏(简化版)

流程图

求解代码

static class Minister{
        long a;
        long b;

        Minister(long a,long b){
            this.a = a;
            this.b = b;
        }
    }


    public static void main(String[] args) throws IOException{
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        PrintWriter out = new PrintWriter(new OutputStreamWriter(System.out));

        int n = Integer.parseInt(br.readLine().trim());

        String[] str = br.readLine().trim().split("\\s+");

        long a0 = Long.parseLong(str[0]);

        Minister[] ministers = new Minister[n];
        for(int i=0;i<n;i++){
            String[] ministerStr = br.readLine().trim().split("\\s+");
            long a = Long.parseLong(ministerStr[0]);
            long b = Long.parseLong(ministerStr[1]);

            ministers[i]=new Minister(a, b);

        }

        Arrays.sort(ministers,(x,y)->Long.compare(x.a*x.b, y.a*y.b));

        // 计算最大金币数
        long maxCoin = 0;
        long productA = a0; // 前序左手数的乘积（初始为国王的a0）
        for (Minister m : ministers) {
            // 当前大臣的金币数 = 前序乘积 / 当前b
            long coin = productA / m.b;
            // 更新最大金币数
            if (coin > maxCoin) {
                maxCoin = coin;
            }
            // 前序乘积 *= 当前大臣的a
            productA *= m.a;
        }

        out.println(maxCoin);
        out.flush();
        out.close();
        br.close();
    }