View Compilation Error

0_0_16984865_25669\Main.java:14: 错误: 不兼容的类型: double无法转换为Long
k=(Long)Math.sqrt(x);
                 ^
0_0_16984865_25669\Main.java:27: 错误: 不兼容的类型: double无法转换为Long
k=(Long)Math.sqrt(y);
                 ^
2 个错误