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  1. #include<bits/stdc++.h>
  2. #define L(i, j, k) for(int i = (j); i <= (k); ++i)
  3. #define R(i, j, k) for(int i = (j); i >= (k); --i)
  4. #define ll long long 
  5. #define sz(a) ((int) (a).size())
  6. #define pb emplace_back
  7. #define me(a, x) memset(a, x, sizeof(a))
  8. #define vi vector<int>
  9. #define ull unsigned long long
  10. #define i128 __int128
  11. using namespace std;
  12. const int N = 1e6 + 7;
  13. int n, m;
  14. string s[N];
  15. int P(int x, int y) {
  16. 	return (x - 1) * m + y;
  17. }
  18. int dt[4][2] = {{1, 0}, {-1, 0}, {0, 1}, {0, -1}};
  19. map<char,int>mp;
  20. int go[N];
  21. vi e[N];
  22. int vis[N];
  23. void dfs(int x) {
  24. 	for(auto v : e[x]) {
  25. 		vis[v] = 1;
  26. 		dfs(v);
  27. 	}
  28. }
  29. void Main() {
  30. 	cin >> n >> m;
  31. 	L(i, 1, n) {
  32. 		cin >> s[i];
  33. 		s[i].insert(s[i].begin(), ' ');
  34. 	}
  35. 	L(i, 1, n * m) vis[i] = 0;
  36. 	L(i, 1, n) {
  37. 		L(j, 1, m) {
  38. 			go[P(i, j)] = -1;
  39. 			if(s[i][j] != '?') {
  40. 				int d = mp[s[i][j]];
  41. 				int ni = i + dt[d][0];
  42. 				int nj = j + dt[d][1];
  43. 				if(1 <= ni && ni <= n && 1 <= nj && nj <= m) {
  44. 					go[P(i, j)] = P(ni, nj);
  45. 				} else {
  46. 					go[P(i, j)] = 0;
  47. 				}
  48. 				e[go[P(i, j)]].pb(P(i, j));
  49. 			}
  50. 		}
  51. 	}
  52. 	dfs(0);
  53. 	int ans = 0;
  54. 	L(i, 1, n) L(j, 1, m) {
  55. 		if(s[i][j] != '?') {
  56. 			ans += !vis[P(i, j)];
  57. 		} else {
  58. 			int win = 1;
  59. 			L(d, 0, 3) {
  60. 				int ni = i + dt[d][0];
  61. 				int nj = j + dt[d][1];
  62. 				if(1 <= ni && ni <= n && 1 <= nj && nj <= m) {
  63. 					win &= vis[P(ni, nj)];
  64. 				} 
  65. 			}
  66. 			if(!win) ans += 1;
  67. 		}
  68. 	}
  69. 	cout << ans << '\n';
  70. 	L(i, 0, n * m) e[i].clear();
  71. }
  72. int main() {
  73. 	mp['D']=0;
  74. 	mp['U']=1;
  75. 	mp['R']=2;
  76. 	mp['L']=3;
  77. 	ios :: sync_with_stdio(false);
  78. 	cin.tie(0); cout.tie(0);
  79. 	int t; cin >> t; while(t--) Main();
  80. 	return 0;
  81. }
Success #stdin #stdout 0.02s 61700KB
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https://ideone.com/zWx7fk
language:
C++14 (gcc 8.3)
created:
26 days ago
visibility:
public

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