#include<stdio.h>
#include<ctype.h>
#include<random>
#include<time.h>
#include<vector>
namespace IO {
	constexpr int bufsize = 230005;
	char buf[bufsize], *f1, *f2;
	#define gtchar() (f1 == f2 && (f2 = buf + fread(f1 = buf, 1, bufsize, stdin)) == buf? EOF: *f1++)
	template<typename t> void read(t &ret)
	{
		int f = ret = 0;
		char ch = gtchar();
		while(!isdigit(ch)) f = ch == '-', ch = gtchar();
		while(isdigit(ch)) ret = (ret << 3) + (ret << 1) + (ch ^ 48), ch = gtchar();
		if(f) ret = -ret;
	}
	#undef gtchar
	template<typename t, typename ...T> void read(t &a, T &...b) {read(a), read(b...);}
}using IO::read;
typedef long long ll;
constexpr int maxn = 2005, mod = 1e9 + 7;
int n, cx, cy, idxx[maxn], idxy[maxn], nx[15], ny[15], g[maxn][15];
void Add(int &a, int b) {if((a += b) >= mod) a -= mod;}
struct matrix {
	int x, y, c[maxn][maxn];
	void init(int _x, int _y)
	{
		x = _x, y = _y;
		for(int i = 1; i <= x; ++i)
			for(int j = 1; j <= y; ++j)
				c[i][j] = 0;
	}
	friend matrix operator * (const matrix &a, const matrix &b)
	{
		matrix ret;
		ret.init(a.x, b.y);
		for(int i = 1; i <= a.x; ++i)
			for(int j = 1; j <= a.y; ++j)
				for(int k = 1; k <= b.y; ++k)
					Add(ret.c[i][k], (ll) a.c[i][j] * b.c[j][k] % mod);
		return ret;
	}
}A, B, C, D;
std::mt19937_64 rnd(std::random_device{}() ^ time(0));
typedef std::pair<int, int> pii;
ll qpow(ll a, int b)
{
	ll ret = 1;
	while(b)
	{
		if(b & 1) ret = ret * a % mod;
		a = a * a % mod;
		b >>= 1;
	}
	return ret;
}
void swap(int &a, int &b) {a ^= b ^= a ^= b;}
void gauss(int m)
{
	int line = 1;
	for(int i = 1; i <= m; ++i)
	{
		int cur = line;
		for(int j = line + 1; j <= n; ++j) if(g[j][i] > g[cur][i]) cur = j;
		// if(!g[cur][i]) continue;
		if(line != cur) for(int j = i; j <= m + 1; ++j) swap(g[line][j], g[cur][j]);
		ll inv = qpow(g[line][i], mod - 2);
		for(int j = i; j <= m + 1; ++j) g[line][j] = g[line][j] * inv % mod;
		for(int j = 1; j <= n; ++j) if(j != line && g[j][i])
		{
			ll base = g[j][i];
			g[j][i] = 0;
			for(int k = i + 1; k <= m + 1; ++k) Add(g[j][k], mod - base * g[line][k] % mod);
		}
		++line;
	}
}
int main()
{
	// freopen(".in", "r", stdin);
	// freopen(".out", "w", stdout);
	read(n);
	for(int i = 1; i <= n; ++i) for(int j = 1; j <= n; ++j) read(A.c[i][j]);
	for(int i = 1; i <= n; ++i) for(int j = 1; j <= n; ++j) read(B.c[i][j]);
	//find the illegal columns
	C.init(1, n);
	for(int i = 1; i <= n; ++i) C.c[1][i] = rnd() % mod;
	D = C * A * B;
	for(int i = 1; i <= n; ++i) if(D.c[1][i] != C.c[1][i]) ny[idxy[i] = ++cy] = i;

	//find the illegal rows
	C.init(n, 1);
	for(int i = 1; i <= n; ++i) C.c[i][1] = rnd() % mod;
	D = A * C, D = B * D;
	for(int i = 1; i <= n; ++i) if(D.c[i][1] != C.c[i][1]) nx[idxx[i] = ++cx] = i;
	std::vector<std::pair<pii, int> > ans;
	for(int i = 1; i <= cy; ++i)
	{
		int ii = ny[i];
		for(int j = 1; j <= n; ++j)
		{
			int val = 0;//常数项
			for(int k = 1; k <= n; ++k)
			{
				if(idxx[k]) g[j][idxx[k]] = A.c[j][k];
				else Add(val, (ll) A.c[j][k] * B.c[k][ii] % mod);
			}
			val = val? mod - val: 0;
			if(j == ii) Add(val, 1);
			g[j][cx + 1] = val;
		}
		gauss(cx);
		for(int j = 1; j <= cx; ++j) if(B.c[nx[j]][ii] != g[j][cx + 1])
			ans.push_back({{nx[j], ii}, g[j][cx + 1]});
	}
	printf("%llu\n", ans.size());
	for(auto t : ans) printf("%d %d %d\n", t.first.first, t.first.second, t.second);
	return 0;
}