#include <iostream> #include <set> using namespace std; set<int> s[100000]; int n, m, k, r, c, z, x; bool empty(int x, int y) { return s[x].find(y) == s[x].end(); } bool trail(int x1, int y1, int x2, int y2) { int d = x2 + y2 - x1 - y1; if (d == 1) return true; d /= 2; if (x2 - x1 >= y2 - y1) { for (int x=x1+d, y=y1; y<=y2; x--, y++) if (empty(x, y) && trail(x1, y1, x, y) && trail(x, y, x2, y2)) return true; } else { for (int y=y1+d, x=x1; x<=x2; y--, x++) if (empty(x, y) && trail(x1, y1, x, y) && trail(x, y, x2, y2)) return true; } return false; } main() { x = 0; cin >> n >> m >> k; for (int i=0; i<k; i++) { cin >> r >> c >> z; r = (r ^ x) % n; c = (c ^ x) % m; s[r].insert(c); if (trail(0, 0, n-1, m-1)) { cout << "NIE" << endl; } else { cout << "TAK" << endl; s[r].erase(c); x ^= z; } } return 0; }
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 | #include <iostream> #include <set> using namespace std; set<int> s[100000]; int n, m, k, r, c, z, x; bool empty(int x, int y) { return s[x].find(y) == s[x].end(); } bool trail(int x1, int y1, int x2, int y2) { int d = x2 + y2 - x1 - y1; if (d == 1) return true; d /= 2; if (x2 - x1 >= y2 - y1) { for (int x=x1+d, y=y1; y<=y2; x--, y++) if (empty(x, y) && trail(x1, y1, x, y) && trail(x, y, x2, y2)) return true; } else { for (int y=y1+d, x=x1; x<=x2; y--, x++) if (empty(x, y) && trail(x1, y1, x, y) && trail(x, y, x2, y2)) return true; } return false; } main() { x = 0; cin >> n >> m >> k; for (int i=0; i<k; i++) { cin >> r >> c >> z; r = (r ^ x) % n; c = (c ^ x) % m; s[r].insert(c); if (trail(0, 0, n-1, m-1)) { cout << "NIE" << endl; } else { cout << "TAK" << endl; s[r].erase(c); x ^= z; } } return 0; } |