#include <bits/stdc++.h>
static char buf[1000000],*paa=buf,*pd=buf;
static char buf2[1000000],*pp=buf2;
#define getchar() paa==pd&&(pd=(paa=buf)+fread(buf,1,1000000,stdin),paa==pd)?EOF:*paa++
inline void pc(char ch){
	if(pp-buf2==1000000) fwrite(buf2,1,1000000,stdout),pp=buf2;
	*pp++=ch;
}
inline void pcc(){
	fwrite(buf2,1,pp-buf2,stdout);
	pp=buf2;
}
inline int read(void){
	int w=1;
	register int x(0);register char c(getchar());
	while(c<'0'||c>'9'){if(c=='-') w=-1;c=getchar();}
	while(c>='0'&&c<='9')x=(x<<1)+(x<<3)+(c^48),c=getchar();
	return w*x;
}
void write(int x){
	static int sta[20];
	int top=0;
	do{
		sta[top++]=x%10,x/=10;
	}while(x);
	while(top) pc(sta[--top]+48);
}
void we(int x){
	write(x);
	pc('\n');
}
int C,T,N,M,a[1000009],b[1000009];
#define LL long long
LL sv() {
	LL aq=0;
	for(int i=30;i>=0;i--) {
		bool ff=0;
		int ss=0;
		for(int j=1;j<=N;j++) {
			if((a[j]>>i)&1) ff^=1;
			ss^=a[j];
		}
		if(ff) {
			int ans=(1<<31)-1;
			for(int j=1;j<=N;j++) {
				if((a[j]>>i)%2==0) {
					int x=(a[j]&((1<<i)-1));
					ans=std::min(ans,(1<<i)-x);
				}
			}
			for(int j=1;j<=N;j++) {
				if((a[j]>>i)%2==0) {
					int x=(a[j]&((1<<i)-1));
					if(ans==(1<<i)-x) {
						a[j]+=(1<<i)-x;
						aq+=(1<<i)-x;
						break;
					}
				}
			}
		}
	}	
	return aq;	
}
#define INF_LL 0x3f3f3f3f3f3f3f3f
signed main(void) {
	C=read();T=read();
	while(T--) {
		N=read();M=read();
		int ss=0;
		for(int i=1;i<=N;i++) {
			a[i]=read();
			b[i]=a[i];
			ss^=a[i];
		}
		if(ss==0) {
			printf("0\n1\n0\n\n\n");
			continue;
		}
		long long ans=INF_LL;
		for(int j=30;j>=0;j--) {
			if(ss>=(1<<j+1)) continue;
			int as=(1<<31)-1;
			for(int i=1;i<=N;i++) {
				if(((a[i]>>j)&1)==0) {
					int vv=(a[i]&((1<<j)-1));
					as=std::min(as,(1<<j)-vv);
				}
			}
			for(int i=1;i<=N;i++) {
				if(((a[i]>>j)&1)==0) {
					int vv=(a[i]&((1<<j)-1));
					if(as==(1<<j)-vv) {
						a[i]+=(1<<j)-vv;
						ans=std::min(ans,sv()+(1<<j)-vv);
						for(int k=1;k<=N;k++) a[k]=b[k];
						break;
					}
				}
			}
		}
		printf("%lld\n0\n",ans);	
	}
}