编译失败，大神帮看下。

#include<iostream>

using namespace std;
int main()
{
	char a[13];
	int is=0,flag=1;	
	for(int i=0;i<13;i++)cin>>a[i];
	for(int i=0;i<11;i++)
	{
		if((i!=1)&&(i!=5))
		{		
			is=is+(a[i]-'0')*flag;		
			flag++;	
		}		
	}
	is=is%11;
	if (is==10&&a[12]=='X'||is==a[12]-'0')
		cout<<"Right";
	else
		{			
			a[12]=is+'0';
			cout<<a;
		}	
	return 0;	
}

编译失败

        Judger Internal Error

Traceback (most recent call last): File "/app/luogu-judger/source/tasks/Compile.py", line 60, in compile enable_o2=enable_o2) File "/app/luogu-judger/source/compiler/Compiler.py", line 69, in compile writable_files=[work_dest_path, work_dir]) File "/app/luogu-judger/source/executor/LrunExecutor.py", line 73, in execute raise RuntimeError("Unexpected lrun failure with exit code " + str(ret)) RuntimeError: Unexpected lrun failure with exit code 13