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View Compilation Error

0_0_33110506_32618\Main.java:20: 错误: 找不到符号
				sum += s[j];
				       ^
  符号:   变量 s
  位置: 类 Main
0_0_33110506_32618\Main.java:27: 错误: 二元运算符 '&&' 的操作数类型错误
				}else if(i<=m && j=n)
				              ^
  第一个类型:  boolean
  第二个类型: int
2 个错误


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