oj.uz

Submission #682098

# Submission time Handle Problem Language Result Execution time Memory
682098 2023-01-15T17:25:54 Z ethening Dango Maker (JOI18_dango_maker) C++17
100 / 100
 256 ms 183072 KB 
#include "bits/stdc++.h"
using namespace std;
using ll = long long;

// RGW

// template<class T>
// struct dinic {
//   static constexpr T INF = numeric_limits<T>::max();
//   struct edge {
//     int v, r; T c;
//     edge(int _v, int _r, T _c) : v{_v}, r{_r}, c{_c} {}
//   };
//   int n, s, t;
//   vector<vector<edge>> G;
//   vector<int> d, arc;
//   dinic(int _n, int _s, int _t) : n{_n}, s{_s}, t{_t}, G(_n) {}

//   void add_edge(int u, int v, T c) {
//     G[u].emplace_back(v, (int)G[v].size(), c);
//     G[v].emplace_back(u, (int)G[u].size() - 1, 0);
//   }
//   int bfs() {
//     d.assign(n, 0), arc.assign(n, 0);
//     queue<int> q;
//     d[s] = 1, q.emplace(s);
//     while (!q.empty()) {
//       int u = q.front();
//       q.pop();
//       for (auto [v, r, c] : G[u]) {
//         if (!d[v] && c) {
//           d[v] = d[u] + 1;
//           if (v == t) return 1;
//           q.emplace(v);
//         }
//       }
//     }
//     return d[t];
//   }
//   T dfs(int u, T f) {
//     if (u == t) return f;
//     T sum = 0;
//     for (int& i = arc[u]; i < (int)G[u].size(); ++i) {
//       auto& [v, r, c] = G[u][i];
//       if (d[v] == d[u] + 1 && c) {
//         T res = dfs(v, min(f, c));
//         if (res) {
//           c -= res, G[v][r].c += res;
//           sum += res, f -= res;
//           if (!f) return sum;
//         } else {
//           d[v] = 0;
//         }
//       }
//     }
//     return sum;
//   }
//   T max_flow() {
//     T sum = 0;
//     while (bfs()) {
//       while (T res = dfs(s, INF)) {
//         sum += res;
//       }
//     }
//     return sum;
//   }
// };

// bool dfs(int cur) {
// 	for (int nxt : va[cur]) {
// 		if (!visitb[nxt]) {
// 			visitb[nxt] = true;
// 			clrS.push(nxt);
// 			if (mb[nxt] == 0 || dfs(mb[nxt])) {
// 				ma[cur] = nxt;
// 				mb[nxt] = cur;
// 				return true;
// 			}
// 		}
// 	}
// 	return false;
// }


// int bipartite_matching() {
// 	memset(ma, -1, sizeof(ma));
// 	memset(mb, -1, sizeof(mb));
// 	int ret = 0;
// 	for (int i = 1; i <= cnt; i++) {
// 		while (!clrS.empty()) {
// 			visitb[clrS.top()] = false;
// 			clrS.pop();
// 		}
// 		if (dfs(i)) ++ret;
// 	}
// 	return ret;
// }

int dp[6005][3005][2][2];
string s[3005];

int main() {
	int n, m;
	cin.tie(0)->sync_with_stdio(0);
	cin >> n >> m;

	for (int i = 0; i < n; i++) {
		cin >> s[i];
	}

	int ans = 0;

	for (int k = 0; k < n + m - 1; k++) {
		for (int i = max(0, k - m + 1); i < min(n, k + 1); i++) {
			int j = k - i;
			if (i == 0) {
				dp[k][i][0][0] = 0;
			}
			else {
				dp[k][i][0][0] = max(dp[k][i][0][0], dp[k][i - 1][0][0]);
				dp[k][i][0][0] = max(dp[k][i][0][0], dp[k][i - 1][0][1]);
				dp[k][i][0][0] = max(dp[k][i][0][0], dp[k][i - 1][1][0]);
			}
			if (s[i][j] != 'G') continue;
			if (j - 1 >= 0 && j + 1 < m && s[i][j - 1] == 'R' && s[i][j + 1] == 'W') {
				if (i == 0) {
					dp[k][i][1][0] = 1;
				}
				else {
					dp[k][i][1][0] = max(dp[k][i][1][0], dp[k][i - 1][0][0] + 1);
					dp[k][i][1][0] = max(dp[k][i][1][0], dp[k][i - 1][1][0] + 1);
				}
			}
			if (i - 1 >= 0 && i + 1 < n && s[i - 1][j] == 'R' && s[i + 1][j] == 'W') {
				if (i == 0) {
					dp[k][i][0][1] = 1;
				}
				else {
					dp[k][i][0][1] = max(dp[k][i][0][1], dp[k][i - 1][0][0] + 1);
					dp[k][i][0][1] = max(dp[k][i][0][1], dp[k][i - 1][0][1] + 1);
				}
			}
		}
		int cur = 0;
		cur = max(cur, dp[k][min(n, k + 1) - 1][0][0]);
		cur = max(cur, dp[k][min(n, k + 1) - 1][0][1]);
		cur = max(cur, dp[k][min(n, k + 1) - 1][1][0]);
		ans += cur;
	}
	cout << ans << endl;

	
	// int cnt, cnt2;
	// cnt = cnt2 = 0;

	// vector a(n, vector<int>(n));
	// for (int i = 0; i < n; i++) {
	// 	for (int j = 0; j < m; j++) {
	// 		if (s[i][j] != 'R') continue;
	// 		if (j + 2 < m) {
	// 			if (s[i][j + 1] == 'G' && s[i][j + 2] == 'W') {
	// 				++cnt;
	// 				// a[i][j] = cnt;
	// 				// a[i][j + 1] = cnt;
	// 				// a[i][j + 2] = cnt;
	// 			}
	// 		}
	// 		if (i + 2 < n) {
	// 			if (s[i + 1][j] == 'G' && s[i + 2][j] == 'W') {
	// 				++cnt2;
	// 				// b[i][j]= cnt2;
	// 				// b[i + 1][j]= cnt2;
	// 				// b[i + 2][j]= cnt2;
	// 			}
	// 		}
	// 	}
	// }

	// return 0;

	// dinic<int> D(cnt + cnt2 + 2, 0, 1);
	// for (int i = 1; i <= cnt; i++) {
	// 	D.add_edge(0, i + 1, 1);
	// }
	// for (int i = 1; i <= cnt2; i++) {
	// 	D.add_edge(cnt + i + 1, 1, 1);
	// }

	// int cnt3 = 0;
	// int cnt4 = 0;
	// for (int k = 0; k < n + m - 1; k++) {
	// 	int prevcnt = -200;
	// 	int prevdex = -200;
	// 	int prevcnt2 = -200;
	// 	int prevdex2 = -200;
	// 	for (int i = max(0, k - m + 1); i < min(n, k + 1); i++) {
	// 		int j = k - i;
	// 		if (s[i][j] != 'R') continue;
	// 		if (j + 2 < m) {
	// 			if (s[i][j + 1] == 'G' && s[i][j + 2] == 'W') {
	// 				++cnt3;
	// 				if (prevdex == i - 1 || prevdex == i - 2) {
	// 					D.add_edge(cnt3 + 1, cnt + prevcnt + 1, D.INF);
	// 					// cout << prevdex << " -> " << i << endl;
	// 				}
	// 				if (prevdex2 == i - 2) {
	// 					D.add_edge(cnt3 + 1, cnt + prevcnt2 + 1, D.INF);
	// 					// cout << prevdex2 << " -> " << i << endl;
	// 				}
	// 				if (i + 2 < n && s[i + 1][j] == 'G' && s[i + 2][j] == 'W') {
	// 					D.add_edge(cnt3 + 1, cnt + cnt4 + 1 + 1, D.INF);
	// 					// cout << i << " -> " << i << endl;
	// 				}
	// 				// b[i][j]= cnt2;
	// 				// b[i + 1][j]= cnt2;
	// 				// b[i + 2][j]= cnt2;
	// 			}
	// 		}
	// 		if (i + 2 < n) {
	// 			if (s[i + 1][j] == 'G' && s[i + 2][j] == 'W') {
	// 				++cnt4;
	// 				swap(prevcnt, prevcnt2);
	// 				swap(prevdex, prevdex2);
	// 				prevcnt = cnt3;
	// 				prevdex = i;
	// 				// a[i][j] = cnt;
	// 				// a[i][j + 1] = cnt;
	// 				// a[i][j + 2] = cnt;
	// 			}
	// 		}
	// 	}
	// } 
	// for (int i = 0; i < n; i++) {
	// 	for (int j = 0; j < m; j++) {
	// 		if (a[i][j] != 0 && b[i][j] != 0) {
	// 			D.add_edge(a[i][j] + 1, cnt + b[i][j] + 1, D.INF);
	// 			// va[a[i][j]].push_back(b[i][j]);
	// 		}
	// 	}
	// }

	// cout << cnt + cnt2 - D.max_flow() << endl;
}

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 0 ms 340 KB Output is correct
13 Correct 0 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 0 ms 340 KB Output is correct
16 Correct 0 ms 340 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 0 ms 340 KB Output is correct
13 Correct 0 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 0 ms 340 KB Output is correct
16 Correct 0 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 0 ms 340 KB Output is correct
19 Correct 1 ms 468 KB Output is correct
20 Correct 1 ms 468 KB Output is correct
21 Correct 1 ms 468 KB Output is correct
22 Correct 1 ms 468 KB Output is correct
23 Correct 0 ms 468 KB Output is correct
24 Correct 0 ms 468 KB Output is correct
25 Correct 0 ms 340 KB Output is correct
26 Correct 0 ms 340 KB Output is correct
27 Correct 1 ms 468 KB Output is correct
28 Correct 0 ms 468 KB Output is correct
29 Correct 1 ms 468 KB Output is correct
30 Correct 1 ms 468 KB Output is correct
31 Correct 0 ms 468 KB Output is correct
32 Correct 0 ms 468 KB Output is correct
33 Correct 1 ms 468 KB Output is correct
34 Correct 0 ms 468 KB Output is correct
35 Correct 0 ms 468 KB Output is correct
36 Correct 1 ms 468 KB Output is correct
37 Correct 1 ms 468 KB Output is correct
38 Correct 0 ms 468 KB Output is correct
39 Correct 0 ms 468 KB Output is correct
40 Correct 1 ms 468 KB Output is correct
41 Correct 1 ms 468 KB Output is correct
42 Correct 1 ms 468 KB Output is correct
43 Correct 1 ms 468 KB Output is correct
44 Correct 1 ms 468 KB Output is correct
45 Correct 1 ms 468 KB Output is correct
46 Correct 0 ms 468 KB Output is correct
47 Correct 1 ms 468 KB Output is correct
48 Correct 0 ms 468 KB Output is correct
49 Correct 1 ms 468 KB Output is correct
50 Correct 0 ms 468 KB Output is correct
51 Correct 1 ms 468 KB Output is correct
52 Correct 0 ms 468 KB Output is correct
53 Correct 0 ms 468 KB Output is correct

Subtask #3
67.0 / 67.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 0 ms 340 KB Output is correct
13 Correct 0 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 0 ms 340 KB Output is correct
16 Correct 0 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 0 ms 340 KB Output is correct
19 Correct 1 ms 468 KB Output is correct
20 Correct 1 ms 468 KB Output is correct
21 Correct 1 ms 468 KB Output is correct
22 Correct 1 ms 468 KB Output is correct
23 Correct 0 ms 468 KB Output is correct
24 Correct 0 ms 468 KB Output is correct
25 Correct 0 ms 340 KB Output is correct
26 Correct 0 ms 340 KB Output is correct
27 Correct 1 ms 468 KB Output is correct
28 Correct 0 ms 468 KB Output is correct
29 Correct 1 ms 468 KB Output is correct
30 Correct 1 ms 468 KB Output is correct
31 Correct 0 ms 468 KB Output is correct
32 Correct 0 ms 468 KB Output is correct
33 Correct 1 ms 468 KB Output is correct
34 Correct 0 ms 468 KB Output is correct
35 Correct 0 ms 468 KB Output is correct
36 Correct 1 ms 468 KB Output is correct
37 Correct 1 ms 468 KB Output is correct
38 Correct 0 ms 468 KB Output is correct
39 Correct 0 ms 468 KB Output is correct
40 Correct 1 ms 468 KB Output is correct
41 Correct 1 ms 468 KB Output is correct
42 Correct 1 ms 468 KB Output is correct
43 Correct 1 ms 468 KB Output is correct
44 Correct 1 ms 468 KB Output is correct
45 Correct 1 ms 468 KB Output is correct
46 Correct 0 ms 468 KB Output is correct
47 Correct 1 ms 468 KB Output is correct
48 Correct 0 ms 468 KB Output is correct
49 Correct 1 ms 468 KB Output is correct
50 Correct 0 ms 468 KB Output is correct
51 Correct 1 ms 468 KB Output is correct
52 Correct 0 ms 468 KB Output is correct
53 Correct 0 ms 468 KB Output is correct
54 Correct 5 ms 12628 KB Output is correct
55 Correct 7 ms 12628 KB Output is correct
56 Correct 5 ms 12884 KB Output is correct
57 Correct 5 ms 8848 KB Output is correct
58 Correct 25 ms 25264 KB Output is correct
59 Correct 256 ms 174188 KB Output is correct
60 Correct 209 ms 174156 KB Output is correct
61 Correct 207 ms 174228 KB Output is correct
62 Correct 6 ms 11860 KB Output is correct
63 Correct 225 ms 169124 KB Output is correct
64 Correct 174 ms 182984 KB Output is correct
65 Correct 172 ms 183072 KB Output is correct
66 Correct 176 ms 183012 KB Output is correct
67 Correct 200 ms 183028 KB Output is correct
68 Correct 201 ms 183032 KB Output is correct
69 Correct 175 ms 183008 KB Output is correct
70 Correct 20 ms 26172 KB Output is correct
71 Correct 20 ms 26120 KB Output is correct
72 Correct 22 ms 26148 KB Output is correct
73 Correct 19 ms 26188 KB Output is correct
74 Correct 25 ms 26168 KB Output is correct
75 Correct 20 ms 26208 KB Output is correct
76 Correct 20 ms 26200 KB Output is correct
77 Correct 20 ms 26184 KB Output is correct
78 Correct 21 ms 26188 KB Output is correct
79 Correct 20 ms 26192 KB Output is correct
80 Correct 21 ms 26256 KB Output is correct
81 Correct 21 ms 26180 KB Output is correct
82 Correct 21 ms 26152 KB Output is correct
83 Correct 21 ms 26132 KB Output is correct
84 Correct 21 ms 26160 KB Output is correct
85 Correct 22 ms 26196 KB Output is correct
86 Correct 20 ms 26220 KB Output is correct
87 Correct 21 ms 26144 KB Output is correct
88 Correct 21 ms 26168 KB Output is correct
89 Correct 21 ms 26140 KB Output is correct
90 Correct 20 ms 26188 KB Output is correct