View Compilation Error

0_0_24822750_26674\Main.java:3: 错误: 需要class, interface或enum
public Main {
       ^
0_0_24822750_26674\Main.java:4: 错误: 需要class, interface或enum
	public static void main(String[] args)
	              ^
0_0_24822750_26674\Main.java:7: 错误: 需要class, interface或enum
		int k=cin.nextInt();
		^
0_0_24822750_26674\Main.java:8: 错误: 需要class, interface或enum
		while(k-->0)
		^
0_0_24822750_26674\Main.java:11: 错误: 需要class, interface或enum
			int sum=0;
			^
0_0_24822750_26674\Main.java:12: 错误: 需要class, interface或enum
			while(n-->0)
			^
0_0_24822750_26674\Main.java:15: 错误: 需要class, interface或enum
				sum+=a;
				^
0_0_24822750_26674\Main.java:16: 错误: 需要class, interface或enum
			}
			^
0_0_24822750_26674\Main.java:18: 错误: 需要class, interface或enum
			if(k!=0)
			^
0_0_24822750_26674\Main.java:20: 错误: 需要class, interface或enum
		}
		^
10 个错误