Vaihdot

input/code.cpp: In function 'void s(int)':
input/code.cpp:34:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   if(o.size()<len) {
              ^
input/code.cpp: In function 'int main()':
input/code.cpp:72:32: error: return-statement with no value, in function returning 'int' [-fpermissive]
  if(a1==a2) cout << 0 << endl; return;
                                ^
input/code.cpp:78:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i = 0; i<o1.size(); i++) {
                   ^

#include <bits/stdc++.h>

using namespace std;

int n;
vector<int> a1;
vector<int> a2;
vector<int> arr;
vector<string> o1;
vector<string> o;
int len=1e9;
int depth = 6;

void row(int a, int b) {
	o.push_back("1 " + to_string(a) + " " + to_string(b));
	for(int i=0; i<n; i++) {
		int t = arr[ ((a-1)*n) + i ];
		arr[ ((a-1)*n) + i ] = arr[ ((b-1)*n) + i ];
		arr[ ((b-1)*n) + i ] = t;
	}
}
void column(int a, int b) {
	o.push_back("2 " + to_string(a) + " " + to_string(b));
	for(int i=0; i<n; i++) {
		int t = arr[(i*n)+a-1];
		arr[(i*n)+a-1] = arr[(i*n)+b-1];
		arr[(i*n)+b-1] = t;
	}
}

void s(int d) {
	if(d>depth) return;
	if(arr==a2) {
		if(o.size()<len) {
			len = o.size();
			o1 = o;		
		}
		return;
	}

	
	for(int a = 1; a<n; a++) {
		for(int b=a+1; b<=n; b++) {
			for(int i=0; i<=1; i++) {
				vector<int> t = arr;
				if(i==0)
					row(a,b);
				else
					column(a,b);

				s(d+1);

				arr=t;
				o.pop_back();
			}
		}
	}
}

int main() {
	cin.tie(0);
	ios_base::sync_with_stdio(0);

	cin >> n;

	for(int i = 0; i<n*n; i++) {
		int t; cin >> t; a1.push_back(t);
	}
	for(int i = 0; i<n*n; i++) {
		int t; cin >> t; a2.push_back(t);
	}
	if(a1==a2) cout << 0 << endl; return;
	arr = a1;
	s(0);
	if(o1.size()<=0) cout << -1 << endl;
	else {
		cout << o1.size() << endl;
		for(int i = 0; i<o1.size(); i++) {
			cout << o1[i] << endl;
		}
	}
}