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View Compilation Error

0_0_16561350_557\Main.java:20: 错误: 找不到符号
                    if(abs(prex - x) == 2 && abs(prey - y) == 2 && !table[1][1]) return false;
                       ^
  符号:   方法 abs(int)
  位置: 类 Main
0_0_16561350_557\Main.java:20: 错误: 找不到符号
                    if(abs(prex - x) == 2 && abs(prey - y) == 2 && !table[1][1]) return false;
                                             ^
  符号:   方法 abs(int)
  位置: 类 Main
2 个错误


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