// what is matter? never mind. 
#pragma GCC optimize("Ofast")
#pragma GCC optimize("unroll-loops")
//#pragma GCC target("sse,sse2,sse3,sse4,popcnt,abm,mmx,avx,avx2")
#include<bits/stdc++.h>
#define For(i,a,b) for(int i=(a);i<=(b);++i)
#define Rep(i,a,b) for(int i=(a);i>=(b);--i)
#define ll long long
#define ull unsigned long long
//#define int long long
#define SZ(x) ((int)((x).size()))
#define ALL(x) (x).begin(),(x).end()
using namespace std;
inline int read()
{
	char c=getchar();int x=0;bool f=0;
	for(;!isdigit(c);c=getchar())f^=!(c^45);
	for(;isdigit(c);c=getchar())x=(x<<1)+(x<<3)+(c^48);
	return f?-x:x;
}

int mod;
struct modint{
	unsigned int x;
	modint(int o=0){x=o;}
	modint &operator = (int o){return x=o,*this;}
	modint &operator +=(modint o){return x=x+o.x>=mod?x+o.x-mod:x+o.x,*this;}
	modint &operator -=(modint o){return x=x<o.x?x-o.x+mod:x-o.x,*this;}
	modint &operator *=(modint o){return x=1ll*x*o.x%mod,*this;}
	modint &operator ^=(int b){
		modint a=*this,c=1;
		for(;b;b>>=1,a*=a)if(b&1)c*=a;
		return x=c.x,*this;
	}
	modint &operator /=(modint o){return *this *=o^=mod-2;}
	friend modint operator +(modint a,modint b){return a+=b;}
	friend modint operator -(modint a,modint b){return a-=b;}
	friend modint operator *(modint a,modint b){return a*=b;}
	friend modint operator /(modint a,modint b){return a/=b;}
	friend modint operator ^(modint a,int b){return a^=b;}
	friend bool operator ==(modint a,modint b){return a.x==b.x;}
	friend bool operator !=(modint a,modint b){return a.x!=b.x;}
	bool operator ! () {return !x;}
	modint operator - () {return x?mod-x:0;}
	bool operator <(const modint&b)const{return x<b.x;}
};
inline modint qpow(modint x,int y){return x^y;}

vector<modint> fac,ifac,iv;
inline void initC(int n)
{
	if(iv.empty())fac=ifac=iv=vector<modint>(2,1);
	int m=iv.size(); ++n;
	if(m>=n)return;
	iv.resize(n),fac.resize(n),ifac.resize(n);
	For(i,m,n-1){
		iv[i]=iv[mod%i]*(mod-mod/i);
		fac[i]=fac[i-1]*i,ifac[i]=ifac[i-1]*iv[i];
	}
}
inline modint C(int n,int m){
	if(m<0||n<m)return 0;
	return initC(n),fac[n]*ifac[m]*ifac[n-m];
}
inline modint sign(int n){return (n&1)?(mod-1):(1);}

#define fi first
#define se second
#define pb push_back
#define mkp make_pair
typedef pair<int,int>pii;
typedef vector<int>vi;

#define maxn 2000005
#define inf 0x3f3f3f3f

int n;
modint g[505][505],res[505][505];

struct oper{
	int op,i,j;
	modint w;
};
vector<oper>qs;
void add(int i,int j,modint w){
	qs.pb({1,i,j,w});
	For(k,1,n) if(k!=i && k!=j) g[i][k]+=g[j][k]*w,g[k][i]+=g[k][j]*w;
	g[i][i]+=(g[i][j]*w*2+g[j][j]*w*w);
	g[i][j]+=g[j][j]*w;
	g[j][i]+=g[j][j]*w;
}
void sw(int i,int j){
	if(i==j)return;
	qs.pb({0,i,j,0});
	For(k,1,n) if(k!=i && k!=j) swap(g[i][k],g[j][k]),swap(g[k][i],g[k][j]);
	swap(g[i][i],g[j][j]);
}

int sqr[maxn];
int p;

void out(){
	reverse(ALL(qs));
	for(auto [op,i,j,w]:qs){
		if(op==0) swap(res[i],res[j]);
		else{
			For(k,1,p) res[i][k]-=res[j][k]*w;
		}
	}
	cout<<p<<"\n";
	For(i,1,n){
		For(j,1,p)cout<<res[i][j].x<<" \n"[j==p];
	}
	exit(0);
}

signed main()
{
	n=read(),mod=read();
	For(i,1,n) For(j,1,n) g[i][j]=read();
	For(i,0,mod) sqr[i]=-1;
	For(i,0,mod-1){
		modint t=i; t*=i;
		sqr[t.x]=i;
	}
	
	bool flag=1;
	
	int sums=0;
	
	p=1;
	while(1){
		++sums;
		if(sums>3000){
			puts("????");
			cout<<"flag,p "<<flag<<" "<<p<<"\n";
			For(i,p,p+2)For(j,p,p+2)cout<<g[i][j].x<<" \n"[j==p+2];
			exit(0);
		}
		bool ok=0;
		For(i,p,n){
			if(g[i][i].x){
				sw(i,p);
				modint I=1/g[p][p];
				For(j,p+1,n) add(j,p,-I*g[j][p]);
				++p; ok=1; break;
			}
		}
		if(ok)continue;
		
		auto find2=[&](){
			For(i,p,n) For(j,i+1,n) if(g[i][j].x){
				if(sums>2000) cout<<"find2 "<<i<<" "<<j<<"\n";
				sw(i,p),sw(j,p+1);
				return 1;
			}
			return 0;
		};
		
		if(!find2()) break;
		
		if(mod>2){
			add(p,p+1,1);
			continue;
		}
		For(k,p+2,n){
			if(g[p][k].x) add(k,p+1,1);
			if(g[p+1][k].x) add(k,p,1);
		}
		if(p>1 && flag){
			if(sums>2000){
				For(k,p-1,p+1) For(kk,p-1,p+1) cout<<g[k][kk].x<<" \n"[kk==p+1]; puts("---");
			}
			add(p,p-1,1);
			add(p+1,p-1,1);
			add(p-1,p,1);
			add(p-1,p+1,1);
			if(sums>2000){
				For(k,p-1,p+1) For(kk,p-1,p+1) cout<<g[k][kk].x<<" \n"[kk==p+1]; puts("---");
			}
			p-=1;
			flag=1;
			continue;
		}
		
		flag=0;
		p+=2;
	}
	--p;
	
//	For(i,1,n){
//		For(j,1,n)cout<<g[i][j].x<<" ";
//		cout<<"\n";
//	}

	if(mod==2 && !flag){
		++p;
		For(i,1,p-1){
			For(j,1,i) res[i][j]=1;
			res[i][p]=1;
			if(i%2==0) res[i][i-1]=0;
		}
		out();
	}
	
	int z=0;
	For(i,0,mod-1){
		modint y=i; y*=i,y+=1;
		if(sqr[y.x]==-1) z=i;
	}

	int lst=0;
	For(i,1,p){
		if(sqr[g[i][i].x]!=-1) res[i][i]=sqr[g[i][i].x];//cout<<"isok "<<i<<"\n";
		else if(!lst) lst=i;
		else {
			int j=lst; lst=0;
			res[i][i]=z;
			res[j][j]=z;
			res[i][j]=1;
			res[j][i]=mod-1;
			modint zz=sqr[(g[i][i]/(z*z+1)).x];
			res[i][j]*=zz,res[i][i]*=zz;
			zz=sqr[(g[j][j]/(z*z+1)).x];
			res[j][j]*=zz,res[j][i]*=zz;
		}
	}
	if(lst){
		++p;
		int i=lst;
		res[i][i]=g[i][i];
		res[i][p]=g[i][i]*z;
		modint zz=sqr[(res[i][i]/(z*z+1)).x];
		res[i][i]*=zz,res[i][p]*=zz;
	}
	
//	For(i,1,n) For(j,1,p) cout<<res[i][j].x<<" \n"[j==p];
	out();
	return 0;
}
/*
5 2
1 0 0 0 0
0 0 1 0 0
0 1 0 0 0
0 0 0 0 1
0 0 0 1 0

2 2
0 1
1 0

3 5
4 4 3
4 4 3
3 3 2
*/