View Compilation Error

0_0_37316134_15699\Main.java:1: 错误: 非法字符: '#'
#include<iostream>
^
0_0_37316134_15699\Main.java:1: 错误: 需要class, interface或enum
#include<iostream>
        ^
0_0_37316134_15699\Main.java:2: 错误: 非法字符: '#'
#include<algorithm>
^
0_0_37316134_15699\Main.java:3: 错误: 非法字符: '#'
#include<cmath>
^
0_0_37316134_15699\Main.java:5: 错误: 需要class, interface或enum
typedef long long LL;
^
0_0_37316134_15699\Main.java:6: 错误: 需要class, interface或enum
int main(void)
^
0_0_37316134_15699\Main.java:9: 错误: 需要class, interface或enum
	cin>>t;
	^
0_0_37316134_15699\Main.java:10: 错误: 需要class, interface或enum
	while(t--)
	^
0_0_37316134_15699\Main.java:13: 错误: 需要class, interface或enum
		cin>>n;
		^
0_0_37316134_15699\Main.java:14: 错误: 需要class, interface或enum
		cout<<((1<<n)-1)<<endl;
		^
0_0_37316134_15699\Main.java:17: 错误: 需要class, interface或enum
	}
	^
0_0_37316134_15699\Main.java:19: 错误: 需要class, interface或enum
}
^
12 个错误