#include <iostream> #include <vector> #include <unordered_set> #include <queue> #include <cstring> int nwd(int a, int b) { return a==0?b:nwd(b%a,a); } int nww(int a, int b) { return a*b/nwd(a,b); } const int MAXMN = 1000000+9; // const int MAXT = 840; // NWW(2,3,...,8) int MAXT = 840; const int INF = 1000000000+9; char S[MAXMN][9]; uint8_t L[MAXMN]; std::vector<int> M[MAXMN]; std::vector<std::unordered_set<int>> G; std::vector<std::unordered_set<int>> I; std::vector<bool> B; int n,m,q; inline int index2(int x, int y) { if (x < 0 || y<0 || x>=m || y >=n) return MAXMN-1; return y*m+x; } inline int index(int x, int y) { return y*(m+1)+x; } inline std::tuple<int,int> next(int x, int y, int i) { if (i==0) return {x+1, y}; else if (i==1) return {x-1,y}; else if (i==2) return {x,y+1}; else if (i==3) return {x,y-1}; else return {-1, -1}; } inline bool green(int x, int y, int t, int i) { if (i==0) { return S[index2(x,y-1)][t%L[index2(x,y-1)]] == '1' || S[index2(x,y)][t%L[index2(x,y)]] == '1'; } else if (i==1) { return S[index2(x-1,y-1)][t%L[index2(x-1,y-1)]] == '1' || S[index2(x-1,y)][t%L[index2(x-1,y)]] == '1'; } else if (i==2) { return S[index2(x-1,y)][t%L[index2(x-1,y)]] == '0' || S[index2(x,y)][t%L[index2(x,y)]] == '0'; } else if (i==3) { return S[index2(x-1,y-1)][t%L[index2(x-1,y-1)]] == '0' || S[index2(x,y-1)][t%L[index2(x,y-1)]] == '0'; } else return false; } inline bool ok(int x, int y) { return x >= 0 && x <= m && y >= 0 && y <= n; } void BFS1(int x, int y, int t, int id) { std::queue<std::tuple<int, int>> Q; Q.push({x,y}); M[index(x,y)][t] = id; I[id].insert(index(x,y)); while (!Q.empty()) { auto [x, y] = Q.front(); Q.pop(); for (int i=0;i<4;++i) { auto [dx, dy] = next(x,y,i); if (ok(dx,dy) && M[index(dx,dy)][t] == 0 && green(x,y,t,i)) { Q.push({dx,dy}); M[index(dx,dy)][t] = id; I[id].insert(index(dx,dy)); } } } } void BuildG() { G.push_back({}); I.push_back({}); for (int y=0;y<=n;++y) for (int x=0;x<=m;++x) M[index(x,y)] = std::vector<int>(MAXT, 0); for (int t=0;t<MAXT;++t) for (int y=0;y<=n;++y) for (int x=0;x<=m;++x) if (M[index(x,y)][t] == 0) { int id = G.size(); G.push_back({}); I.push_back({}); BFS1(x,y,t,id); } for (int t=0;t<MAXT-1;++t) for (int y=0;y<=n;++y) for (int x=0;x<=m;++x) G[M[index(x,y)][t]].insert(M[index(x,y)][t+1]); for (int y=0;y<=n;++y) for (int x=0;x<=m;++x) G[M[index(x,y)][MAXT-1]].insert(M[index(x,y)][0]); } int BFS(int x, int y, int tx, int ty, int t) { int ti = index(tx,ty); std::queue<int> Q; int v = M[index(x,y)][t%MAXT]; if (I[v].count(ti)) return t; Q.push(v); std::vector<int> D(G.size(), INF); D[v] = 0; while (!Q.empty()) { v = Q.front(); Q.pop(); for (int w : G[v]) { if (D[w] == INF) { D[w] = D[v]+1; if (I[w].count(ti)) return t + D[w]; Q.push(w); } } } return t; } int main() { std::ios_base::sync_with_stdio(0); std::cin >> n >> m >> q; strcpy(S[MAXMN-1], "$$$$$$$$"); L[MAXMN-1] = 8; MAXT = 2; for (int y=0;y<n;++y) for (int x=0;x<m;++x) { auto& s = S[index2(x,y)]; std::cin >> s; int l = L[index2(x,y)] = strlen(s); MAXT = nww(MAXT, l); } BuildG(); for (int i=0;i<q;++i) { int sx, sy, tx, ty, t; std::cin >> t >> sy >> sx >> ty >> tx; std::cout << BFS(sx, sy, tx, ty, t) << "\n"; } 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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 | #include <iostream> #include <vector> #include <unordered_set> #include <queue> #include <cstring> int nwd(int a, int b) { return a==0?b:nwd(b%a,a); } int nww(int a, int b) { return a*b/nwd(a,b); } const int MAXMN = 1000000+9; // const int MAXT = 840; // NWW(2,3,...,8) int MAXT = 840; const int INF = 1000000000+9; char S[MAXMN][9]; uint8_t L[MAXMN]; std::vector<int> M[MAXMN]; std::vector<std::unordered_set<int>> G; std::vector<std::unordered_set<int>> I; std::vector<bool> B; int n,m,q; inline int index2(int x, int y) { if (x < 0 || y<0 || x>=m || y >=n) return MAXMN-1; return y*m+x; } inline int index(int x, int y) { return y*(m+1)+x; } inline std::tuple<int,int> next(int x, int y, int i) { if (i==0) return {x+1, y}; else if (i==1) return {x-1,y}; else if (i==2) return {x,y+1}; else if (i==3) return {x,y-1}; else return {-1, -1}; } inline bool green(int x, int y, int t, int i) { if (i==0) { return S[index2(x,y-1)][t%L[index2(x,y-1)]] == '1' || S[index2(x,y)][t%L[index2(x,y)]] == '1'; } else if (i==1) { return S[index2(x-1,y-1)][t%L[index2(x-1,y-1)]] == '1' || S[index2(x-1,y)][t%L[index2(x-1,y)]] == '1'; } else if (i==2) { return S[index2(x-1,y)][t%L[index2(x-1,y)]] == '0' || S[index2(x,y)][t%L[index2(x,y)]] == '0'; } else if (i==3) { return S[index2(x-1,y-1)][t%L[index2(x-1,y-1)]] == '0' || S[index2(x,y-1)][t%L[index2(x,y-1)]] == '0'; } else return false; } inline bool ok(int x, int y) { return x >= 0 && x <= m && y >= 0 && y <= n; } void BFS1(int x, int y, int t, int id) { std::queue<std::tuple<int, int>> Q; Q.push({x,y}); M[index(x,y)][t] = id; I[id].insert(index(x,y)); while (!Q.empty()) { auto [x, y] = Q.front(); Q.pop(); for (int i=0;i<4;++i) { auto [dx, dy] = next(x,y,i); if (ok(dx,dy) && M[index(dx,dy)][t] == 0 && green(x,y,t,i)) { Q.push({dx,dy}); M[index(dx,dy)][t] = id; I[id].insert(index(dx,dy)); } } } } void BuildG() { G.push_back({}); I.push_back({}); for (int y=0;y<=n;++y) for (int x=0;x<=m;++x) M[index(x,y)] = std::vector<int>(MAXT, 0); for (int t=0;t<MAXT;++t) for (int y=0;y<=n;++y) for (int x=0;x<=m;++x) if (M[index(x,y)][t] == 0) { int id = G.size(); G.push_back({}); I.push_back({}); BFS1(x,y,t,id); } for (int t=0;t<MAXT-1;++t) for (int y=0;y<=n;++y) for (int x=0;x<=m;++x) G[M[index(x,y)][t]].insert(M[index(x,y)][t+1]); for (int y=0;y<=n;++y) for (int x=0;x<=m;++x) G[M[index(x,y)][MAXT-1]].insert(M[index(x,y)][0]); } int BFS(int x, int y, int tx, int ty, int t) { int ti = index(tx,ty); std::queue<int> Q; int v = M[index(x,y)][t%MAXT]; if (I[v].count(ti)) return t; Q.push(v); std::vector<int> D(G.size(), INF); D[v] = 0; while (!Q.empty()) { v = Q.front(); Q.pop(); for (int w : G[v]) { if (D[w] == INF) { D[w] = D[v]+1; if (I[w].count(ti)) return t + D[w]; Q.push(w); } } } return t; } int main() { std::ios_base::sync_with_stdio(0); std::cin >> n >> m >> q; strcpy(S[MAXMN-1], "$$$$$$$$"); L[MAXMN-1] = 8; MAXT = 2; for (int y=0;y<n;++y) for (int x=0;x<m;++x) { auto& s = S[index2(x,y)]; std::cin >> s; int l = L[index2(x,y)] = strlen(s); MAXT = nww(MAXT, l); } BuildG(); for (int i=0;i<q;++i) { int sx, sy, tx, ty, t; std::cin >> t >> sy >> sx >> ty >> tx; std::cout << BFS(sx, sy, tx, ty, t) << "\n"; } return 0; } |