#include <iostream> #include <set> using namespace std; void insertIfValid(set<pair<int, int>>& positions, int n, int x, int y) { if (x >= 0 && x < n && y >= 0 && y < n) { positions.insert(make_pair(x, y)); } } int knightL(int n, int a, int b) { set<pair<int, int>> currPositions; currPositions.insert(make_pair(0, 0)); set<pair<int, int>> visited; int numVisited = visited.size(); visited.insert(make_pair(0, 0)); for (int i = 0; visited.size() != numVisited; i++) { numVisited = visited.size(); set<pair<int, int>> nextPositions; for (auto& pos : currPositions) { if (pos.first == n - 1 && pos.second == n - 1) { return i; } insertIfValid(nextPositions, n, pos.first + a, pos.second + b); insertIfValid(nextPositions, n, pos.first + a, pos.second - b); insertIfValid(nextPositions, n, pos.first - a, pos.second + b); insertIfValid(nextPositions, n, pos.first - a, pos.second - b); insertIfValid(nextPositions, n, pos.first + b, pos.second + a); insertIfValid(nextPositions, n, pos.first + b, pos.second - a); insertIfValid(nextPositions, n, pos.first - b, pos.second + a); insertIfValid(nextPositions, n, pos.first - b, pos.second - a); } currPositions = nextPositions; for (auto& pos : currPositions) { visited.insert(pos); } } return -1; } int main() { int N; cin >> N; for (int i = 1; i < N; i++) { for (int j = 1; j < N; j++) { cout << knightL(N, i, j) << " "; } cout << endl; } return 0; }