#include <bits/stdc++.h> using namespace std; const int MAX_N = 2e4; const int COMBI = 8 * 3 * 5 * 7; const int MAX_WORD = 8; const int INF_TIME = MAX_N * MAX_WORD * 10; int col_mask[MAX_N][MAX_WORD + 1]; int row_mask[MAX_N][MAX_WORD + 1]; bool passable[2][MAX_N][COMBI]; bool is_stripes[2][COMBI]; int wait[2][MAX_N][COMBI]; int wait_tree[2][2][3 * MAX_N][COMBI]; int tree_size[2]; bool is_cross[COMBI]; int time_to_cross[COMBI]; bool at_least_one = false; int n, m; int q; void load_board(); void prepare(); void serve_queries(); int main() { ios_base::sync_with_stdio(0); cin.tie(0); load_board(); prepare(); //cerr << passable[0][1][1] << " " << passable[0][2][1] << " " << passable[0][2][2] << endl; //cerr << wait[0][1][1] << " " << wait[0][2][2] << endl; //cerr << wait[0][1][4] << " " << wait[0][1][5] << " " << wait[0][1][6]<< " " << wait[0][1][7] << endl; //cerr << wait_tree[0][1][1][5] << " " << wait_tree[0][1][2][5] << " " << wait_tree[0][1][3][5] << endl; //for (int i = 0; i < 4; i++) //cerr << is_stripes[0][i] << " "; //cerr << endl; //for (int i = 0; i < 4; i++) //cerr << is_stripes[1][i] << " "; //cerr << endl; serve_queries(); return 0; } int get_time(int to_right, int a, int b, int t, int wait_tree[][COMBI], int i, int p, int q) { //cerr << a << " " << b << " " << i << " " << p << " " << q << endl; if (a+1 <= p && q <= b) { //cerr << p << " " << q << " " << wait_tree[i][t] << endl; return wait_tree[i][t]; } int s = (p + q) / 2; int t1, t2; int st_i, st_left, st_right; int nd_i, nd_left, nd_right; st_i = 2 * i; st_left = p; st_right = s; nd_i = 2 * i + 1; nd_left = s + 1; nd_right = q; if (!to_right) { swap(st_i, nd_i); swap(st_left, nd_left); swap(st_right, nd_right); } //cerr << a << " " << b << " " << p << " " << q << endl; if (st_left <= b && st_right > a) t1 = get_time(to_right, a, b, t, wait_tree, st_i, st_left, st_right); else t1 = 0; if (t1 > time_to_cross[t]) return time_to_cross[t]; // no need to check further, this is suboptimal if (nd_left <= b && nd_right > a) t2 = get_time(to_right, a, b, (t + t1) % COMBI, wait_tree, nd_i, nd_left, nd_right); else t2 = 0; return t1 + t2; } void serve_queries() { while(q--) { int t, a, b, c, d; cin >> t >> a >> b >> c >> d; int orig_t = t; t %= COMBI; int t1, t2, result; result = time_to_cross[t]; t1 = get_time(a < c, min(a, c), max(a, c), t, wait_tree[0][(a < c ? 0 : 1)], 1, 1, tree_size[0]); t2 = get_time(b < d, min(b, d), max(b, d), t, wait_tree[1][(b < d ? 0 : 1)], 1, 1, tree_size[1]); result = min(result, max(t1, t2)); cout << orig_t + result << endl; //cerr << " " << t1 << " " << t2 << " " << time_to_cross[t] << endl; } } void get_stripes(int n, bool passable[][COMBI], bool is_stripes[]) { for (int i = 0; i < COMBI; i++) { for (int j = 1; j <= n; j++) if(!passable[j][i]) { is_stripes[i] = true; } } } void get_crossings() { get_stripes(n, passable[0], is_stripes[0]); get_stripes(m, passable[1], is_stripes[1]); for (int i = 0; i < COMBI; i++) { int nxt = (i + 1) % COMBI; if (is_stripes[0][i] && is_stripes[1][nxt]) is_cross[nxt] = true; if (is_stripes[1][i] && is_stripes[0][nxt]) is_cross[nxt] = true; if (is_cross[nxt]) at_least_one = true; } if (at_least_one) { int i = 0; while(!is_cross[i]) i++; time_to_cross[COMBI - 1] = i + 1; for (int i = COMBI - 2; i >= 0; i--) { time_to_cross[i] = is_cross[i + 1] ? 1 : time_to_cross[i + 1] + 1; } } else { for (int i = 0; i < COMBI; i++) time_to_cross[i] = INF_TIME; } } void get_passable(int n, int masks[][MAX_WORD + 1], bool can_pass[][COMBI]) { for (int i = 1; i <= n; i++) { for (int j = 0; j < COMBI; j++) { for (int k = 2; k <= 8; k++) { if (masks[i][k] & (1 << (j % k))) { can_pass[i][j] = true; break; } } } } } void get_wait_times(int n, bool can_pass[][COMBI], int wait_time[][COMBI]) { for (int i = 1; i <= n; i++) { int j = 0; while(!can_pass[i][j]) j++; wait_time[i][COMBI - 1] = can_pass[i][COMBI - 1] ? 0 : j + 1; for (int j = COMBI - 2; j >= 0; j--) { wait_time[i][j] = (can_pass[i][j] ? 0 : wait_time[i][j + 1] + 1); } } } void set_wait_tree(int n, int wait_time[][COMBI], int wait_tree[][3 * MAX_N][COMBI], int &k) { k = 1; while(k < n) k <<= 1; for (int i = 1; i <= n; i++) for (int j = 0; j < COMBI; j++) wait_tree[0][k+i-1][j] = wait_tree[1][k+i-1][j] = wait_time[i][j]; for (int i = k - 1; i > 0; i--) { for (int j = 0; j < COMBI; j++) { int t1, t2; t1 = wait_tree[0][2 * i][j]; t2 = wait_tree[0][2 * i + 1][(j + t1) % COMBI]; wait_tree[0][i][j] = t1 + t2; t1 = wait_tree[1][2 * i + 1][j]; t2 = wait_tree[1][2 * i][(j + t1) % COMBI]; wait_tree[1][i][j] = t1 + t2; } } } void prepare() { get_passable(n, row_mask, passable[0]); get_passable(m, col_mask, passable[1]); get_wait_times(n, passable[0], wait[0]); get_wait_times(m, passable[1], wait[1]); get_crossings(); set_wait_tree(n, wait[0], wait_tree[0], tree_size[0]); //cerr << wait_tree[0][1][1][5] << " " << wait_tree[0][1][2][5] << " " << wait_tree[0][1][3][5] << endl; set_wait_tree(m, wait[1], wait_tree[1], tree_size[1]); } int word_to_mask(string w) { int mask = 0; for (uint i = 0; i < w.size(); i++) mask += ((w[i] == '1') << i); return mask; } int anti_mask(string w) { return ((1 << w.size()) - 1) ^ word_to_mask(w); } void load_board() { cin >> n >> m >> q; for (int i = 1; i <= n; i++) { for (int j = 1; j <= m; j++) { string s; cin >> s; int mask = word_to_mask(s); int anti = anti_mask(s); col_mask[j][s.size()] |= mask; row_mask[i][s.size()] |= anti; } } }
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 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 | #include <bits/stdc++.h> using namespace std; const int MAX_N = 2e4; const int COMBI = 8 * 3 * 5 * 7; const int MAX_WORD = 8; const int INF_TIME = MAX_N * MAX_WORD * 10; int col_mask[MAX_N][MAX_WORD + 1]; int row_mask[MAX_N][MAX_WORD + 1]; bool passable[2][MAX_N][COMBI]; bool is_stripes[2][COMBI]; int wait[2][MAX_N][COMBI]; int wait_tree[2][2][3 * MAX_N][COMBI]; int tree_size[2]; bool is_cross[COMBI]; int time_to_cross[COMBI]; bool at_least_one = false; int n, m; int q; void load_board(); void prepare(); void serve_queries(); int main() { ios_base::sync_with_stdio(0); cin.tie(0); load_board(); prepare(); //cerr << passable[0][1][1] << " " << passable[0][2][1] << " " << passable[0][2][2] << endl; //cerr << wait[0][1][1] << " " << wait[0][2][2] << endl; //cerr << wait[0][1][4] << " " << wait[0][1][5] << " " << wait[0][1][6]<< " " << wait[0][1][7] << endl; //cerr << wait_tree[0][1][1][5] << " " << wait_tree[0][1][2][5] << " " << wait_tree[0][1][3][5] << endl; //for (int i = 0; i < 4; i++) //cerr << is_stripes[0][i] << " "; //cerr << endl; //for (int i = 0; i < 4; i++) //cerr << is_stripes[1][i] << " "; //cerr << endl; serve_queries(); return 0; } int get_time(int to_right, int a, int b, int t, int wait_tree[][COMBI], int i, int p, int q) { //cerr << a << " " << b << " " << i << " " << p << " " << q << endl; if (a+1 <= p && q <= b) { //cerr << p << " " << q << " " << wait_tree[i][t] << endl; return wait_tree[i][t]; } int s = (p + q) / 2; int t1, t2; int st_i, st_left, st_right; int nd_i, nd_left, nd_right; st_i = 2 * i; st_left = p; st_right = s; nd_i = 2 * i + 1; nd_left = s + 1; nd_right = q; if (!to_right) { swap(st_i, nd_i); swap(st_left, nd_left); swap(st_right, nd_right); } //cerr << a << " " << b << " " << p << " " << q << endl; if (st_left <= b && st_right > a) t1 = get_time(to_right, a, b, t, wait_tree, st_i, st_left, st_right); else t1 = 0; if (t1 > time_to_cross[t]) return time_to_cross[t]; // no need to check further, this is suboptimal if (nd_left <= b && nd_right > a) t2 = get_time(to_right, a, b, (t + t1) % COMBI, wait_tree, nd_i, nd_left, nd_right); else t2 = 0; return t1 + t2; } void serve_queries() { while(q--) { int t, a, b, c, d; cin >> t >> a >> b >> c >> d; int orig_t = t; t %= COMBI; int t1, t2, result; result = time_to_cross[t]; t1 = get_time(a < c, min(a, c), max(a, c), t, wait_tree[0][(a < c ? 0 : 1)], 1, 1, tree_size[0]); t2 = get_time(b < d, min(b, d), max(b, d), t, wait_tree[1][(b < d ? 0 : 1)], 1, 1, tree_size[1]); result = min(result, max(t1, t2)); cout << orig_t + result << endl; //cerr << " " << t1 << " " << t2 << " " << time_to_cross[t] << endl; } } void get_stripes(int n, bool passable[][COMBI], bool is_stripes[]) { for (int i = 0; i < COMBI; i++) { for (int j = 1; j <= n; j++) if(!passable[j][i]) { is_stripes[i] = true; } } } void get_crossings() { get_stripes(n, passable[0], is_stripes[0]); get_stripes(m, passable[1], is_stripes[1]); for (int i = 0; i < COMBI; i++) { int nxt = (i + 1) % COMBI; if (is_stripes[0][i] && is_stripes[1][nxt]) is_cross[nxt] = true; if (is_stripes[1][i] && is_stripes[0][nxt]) is_cross[nxt] = true; if (is_cross[nxt]) at_least_one = true; } if (at_least_one) { int i = 0; while(!is_cross[i]) i++; time_to_cross[COMBI - 1] = i + 1; for (int i = COMBI - 2; i >= 0; i--) { time_to_cross[i] = is_cross[i + 1] ? 1 : time_to_cross[i + 1] + 1; } } else { for (int i = 0; i < COMBI; i++) time_to_cross[i] = INF_TIME; } } void get_passable(int n, int masks[][MAX_WORD + 1], bool can_pass[][COMBI]) { for (int i = 1; i <= n; i++) { for (int j = 0; j < COMBI; j++) { for (int k = 2; k <= 8; k++) { if (masks[i][k] & (1 << (j % k))) { can_pass[i][j] = true; break; } } } } } void get_wait_times(int n, bool can_pass[][COMBI], int wait_time[][COMBI]) { for (int i = 1; i <= n; i++) { int j = 0; while(!can_pass[i][j]) j++; wait_time[i][COMBI - 1] = can_pass[i][COMBI - 1] ? 0 : j + 1; for (int j = COMBI - 2; j >= 0; j--) { wait_time[i][j] = (can_pass[i][j] ? 0 : wait_time[i][j + 1] + 1); } } } void set_wait_tree(int n, int wait_time[][COMBI], int wait_tree[][3 * MAX_N][COMBI], int &k) { k = 1; while(k < n) k <<= 1; for (int i = 1; i <= n; i++) for (int j = 0; j < COMBI; j++) wait_tree[0][k+i-1][j] = wait_tree[1][k+i-1][j] = wait_time[i][j]; for (int i = k - 1; i > 0; i--) { for (int j = 0; j < COMBI; j++) { int t1, t2; t1 = wait_tree[0][2 * i][j]; t2 = wait_tree[0][2 * i + 1][(j + t1) % COMBI]; wait_tree[0][i][j] = t1 + t2; t1 = wait_tree[1][2 * i + 1][j]; t2 = wait_tree[1][2 * i][(j + t1) % COMBI]; wait_tree[1][i][j] = t1 + t2; } } } void prepare() { get_passable(n, row_mask, passable[0]); get_passable(m, col_mask, passable[1]); get_wait_times(n, passable[0], wait[0]); get_wait_times(m, passable[1], wait[1]); get_crossings(); set_wait_tree(n, wait[0], wait_tree[0], tree_size[0]); //cerr << wait_tree[0][1][1][5] << " " << wait_tree[0][1][2][5] << " " << wait_tree[0][1][3][5] << endl; set_wait_tree(m, wait[1], wait_tree[1], tree_size[1]); } int word_to_mask(string w) { int mask = 0; for (uint i = 0; i < w.size(); i++) mask += ((w[i] == '1') << i); return mask; } int anti_mask(string w) { return ((1 << w.size()) - 1) ^ word_to_mask(w); } void load_board() { cin >> n >> m >> q; for (int i = 1; i <= n; i++) { for (int j = 1; j <= m; j++) { string s; cin >> s; int mask = word_to_mask(s); int anti = anti_mask(s); col_mask[j][s.size()] |= mask; row_mask[i][s.size()] |= anti; } } } |