#include <bits/stdc++.h> using namespace std; constexpr int CYCLE = 3 * 5 * 7 * 8; constexpr int LOGMAXTIME = 22; // log(7 * 15000) + 1 constexpr int MAXDIM = 15000 + 8; constexpr int MAXPAT = 8; typedef bitset<CYCLE> Bitset; Bitset masks[1 << (MAXPAT + 1)]; vector<Bitset> horiz_block, vert_block; Bitset CycleMask(int len, uint m) { Bitset b; for (int i = 0; i < CYCLE; ++i) if (m & (1 << (i % len))) b.set(i); return b; } void CreateMasks() { for (int len = 2; len <= MAXPAT; ++len) for (uint m = 1; m < 1U << len; ++m) masks[(1 << len) | m] = CycleMask(len, m); } void ReadCross(int i, int j) { char buf[16]; scanf("%s", buf); int len = strlen(buf); uint m = 0; for (int i = 0; i < len; ++i) m |= (buf[i] - '0') << i; Bitset b = masks[(1 << len) | m]; // 1 blocks horiz cross, 0 block vert cross horiz_block[i] &= b; vert_block[j] &= ~b; } struct Query { int t, a, b, c, d; int ans = 0; void Read() { scanf("%d%d%d%d%d", &t, &a, &b, &c, &d); } }; vector<Query> queries; struct Jumps { uint16_t jump[LOGMAXTIME]; }; Jumps graph[MAXDIM][CYCLE]; template <bool forward> void CreateGraph(const vector<Bitset>& block) { int dim = (int) block.size(); for (int t = 0; t < CYCLE; ++t) { if (forward) for (int i = dim; i >= 0; --i) { graph[i][t].jump[0] = i; if (i < dim && !block[i][t]) graph[i][t].jump[0] = graph[i + 1][t].jump[0]; } else for (int i = 0; i <= dim; ++i) { graph[i][t].jump[0] = i; if (i > 0 && !block[i - 1][t]) graph[i][t].jump[0] = graph[i - 1][t].jump[0]; } } for (int logt = 1; logt < LOGMAXTIME; ++logt) { int dt = logt == 1 ? 1 : 1 << (logt - 2); for (int t = 0; t < CYCLE; ++t) { int tt = (t + dt) % CYCLE; for (int i = 0; i <= dim; ++i) graph[i][t].jump[logt] = graph[graph[i][t].jump[logt - 1]][tt].jump[logt - 1]; } } } template <bool forward> int Time(int t, int a, int b) { t %= CYCLE; int res = 0; for (int logt = LOGMAXTIME - 1; logt >= 0; --logt) { int c = graph[a][t].jump[logt]; bool reachable = forward ? b <= c : b >= c; if (reachable) continue; int dt = logt == 0 ? 1 : 1 << (logt - 1); res += dt; t = (t + dt) % CYCLE; a = c; } return res; } void ProcessQueries() { CreateGraph<true>(horiz_block); for (auto& q : queries) if (q.a < q.c) q.ans = max(q.ans, Time<true>(q.t, q.a, q.c)); CreateGraph<false>(horiz_block); for (auto& q : queries) if (q.a > q.c) q.ans = max(q.ans, Time<false>(q.t, q.a, q.c)); CreateGraph<true>(vert_block); for (auto& q : queries) if (q.b < q.d) q.ans = max(q.ans, Time<true>(q.t, q.b, q.d)); CreateGraph<false>(vert_block); for (auto& q : queries) if (q.b > q.d) q.ans = max(q.ans, Time<false>(q.t, q.b, q.d)); } int main() { CreateMasks(); int n, m, q; scanf("%d%d%d", &n, &m, &q); horiz_block.resize(n, ~Bitset()); vert_block.resize(m, ~Bitset()); for (int i = 0; i < n; ++i) for (int j = 0; j < m; ++j) ReadCross(i, j); queries.resize(q); for (auto& query : queries) query.Read(); ProcessQueries(); for (auto& query : queries) printf("%d\n", query.t + query.ans); 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 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 | #include <bits/stdc++.h> using namespace std; constexpr int CYCLE = 3 * 5 * 7 * 8; constexpr int LOGMAXTIME = 22; // log(7 * 15000) + 1 constexpr int MAXDIM = 15000 + 8; constexpr int MAXPAT = 8; typedef bitset<CYCLE> Bitset; Bitset masks[1 << (MAXPAT + 1)]; vector<Bitset> horiz_block, vert_block; Bitset CycleMask(int len, uint m) { Bitset b; for (int i = 0; i < CYCLE; ++i) if (m & (1 << (i % len))) b.set(i); return b; } void CreateMasks() { for (int len = 2; len <= MAXPAT; ++len) for (uint m = 1; m < 1U << len; ++m) masks[(1 << len) | m] = CycleMask(len, m); } void ReadCross(int i, int j) { char buf[16]; scanf("%s", buf); int len = strlen(buf); uint m = 0; for (int i = 0; i < len; ++i) m |= (buf[i] - '0') << i; Bitset b = masks[(1 << len) | m]; // 1 blocks horiz cross, 0 block vert cross horiz_block[i] &= b; vert_block[j] &= ~b; } struct Query { int t, a, b, c, d; int ans = 0; void Read() { scanf("%d%d%d%d%d", &t, &a, &b, &c, &d); } }; vector<Query> queries; struct Jumps { uint16_t jump[LOGMAXTIME]; }; Jumps graph[MAXDIM][CYCLE]; template <bool forward> void CreateGraph(const vector<Bitset>& block) { int dim = (int) block.size(); for (int t = 0; t < CYCLE; ++t) { if (forward) for (int i = dim; i >= 0; --i) { graph[i][t].jump[0] = i; if (i < dim && !block[i][t]) graph[i][t].jump[0] = graph[i + 1][t].jump[0]; } else for (int i = 0; i <= dim; ++i) { graph[i][t].jump[0] = i; if (i > 0 && !block[i - 1][t]) graph[i][t].jump[0] = graph[i - 1][t].jump[0]; } } for (int logt = 1; logt < LOGMAXTIME; ++logt) { int dt = logt == 1 ? 1 : 1 << (logt - 2); for (int t = 0; t < CYCLE; ++t) { int tt = (t + dt) % CYCLE; for (int i = 0; i <= dim; ++i) graph[i][t].jump[logt] = graph[graph[i][t].jump[logt - 1]][tt].jump[logt - 1]; } } } template <bool forward> int Time(int t, int a, int b) { t %= CYCLE; int res = 0; for (int logt = LOGMAXTIME - 1; logt >= 0; --logt) { int c = graph[a][t].jump[logt]; bool reachable = forward ? b <= c : b >= c; if (reachable) continue; int dt = logt == 0 ? 1 : 1 << (logt - 1); res += dt; t = (t + dt) % CYCLE; a = c; } return res; } void ProcessQueries() { CreateGraph<true>(horiz_block); for (auto& q : queries) if (q.a < q.c) q.ans = max(q.ans, Time<true>(q.t, q.a, q.c)); CreateGraph<false>(horiz_block); for (auto& q : queries) if (q.a > q.c) q.ans = max(q.ans, Time<false>(q.t, q.a, q.c)); CreateGraph<true>(vert_block); for (auto& q : queries) if (q.b < q.d) q.ans = max(q.ans, Time<true>(q.t, q.b, q.d)); CreateGraph<false>(vert_block); for (auto& q : queries) if (q.b > q.d) q.ans = max(q.ans, Time<false>(q.t, q.b, q.d)); } int main() { CreateMasks(); int n, m, q; scanf("%d%d%d", &n, &m, &q); horiz_block.resize(n, ~Bitset()); vert_block.resize(m, ~Bitset()); for (int i = 0; i < n; ++i) for (int j = 0; j < m; ++j) ReadCross(i, j); queries.resize(q); for (auto& query : queries) query.Read(); ProcessQueries(); for (auto& query : queries) printf("%d\n", query.t + query.ans); return 0; } |