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Submission #99491

# Submission time Handle Problem Language Result Execution time Memory
99491 2019-03-04T10:58:31 Z mzhao Dango Maker (JOI18_dango_maker) C++11
33 / 100
 556 ms 263168 KB 
#include <bits/stdc++.h>
using namespace std;

int R, C, G[3100][3100], ans;
bool f[3100][3100][2]; // 0 is horizontal, 1 is vertical
int id[3100][3100][2];

int nn;
vector<int> adj[9100100];

void dfs(int p, int x, int y, int z) {
	if (id[x][y][z]) {
		adj[p].push_back(id[x][y][z]);
		return;
	}
	int me = ++nn;
	id[x][y][z] = me;
	adj[p].push_back(id[x][y][z]);
	if (z) {
		if (f[x][y][0]) dfs(me, x, y, 0);
		if (y > 0 && f[x+1][y-1][0]) dfs(me, x+1, y-1, 0);
		if (y > 1 && f[x+2][y-2][0]) dfs(me, x+2, y-2, 0);
	} else {
		if (f[x][y][1]) dfs(me, x, y, 1);
		if (x > 0 && f[x-1][y+1][1]) dfs(me, x-1, y+1, 1);
		if (x > 1 && f[x-2][y+2][1]) dfs(me, x-2, y+2, 1);
	}
}

int dp[9999][4]; // left is first bit   right is second bit
bool vis[9100100];
vector<int> ladj, radj;

void comp(int d, int l, int r) {
	vis[l] = vis[r] = 1;
	ladj.clear(); radj.clear();
	for (int i : adj[l]) if (!vis[i]) ladj.push_back(i);
	for (int i : adj[r]) if (!vis[i]) radj.push_back(i);
	if (!ladj.size() && !radj.size()) {
		if (l) {
			dp[d][0] = 0;
			dp[d][1] = 1;
		}
		if (r) {
			dp[d][2] = 1;
			dp[d][3] = 2;
		}
		return;
	}
	if (l && r && ladj.size() == 1 && radj.size() == 1) {
		comp(d+1, ladj[0], 0);
		dp[d][0] = max(dp[d+1][0], dp[d+1][1]);
		dp[d][1] = dp[d+1][0]+1;
		dp[d][2] = dp[d+1][0]+1;
		dp[d][3] = dp[d+1][0]+2;
	} else if (l && r && ladj.size() == 2 && radj.size() == 1) {
		if (ladj[0] == radj[0]) swap(ladj[0], ladj[1]);
		comp(d+1, ladj[0], ladj[1]);
		dp[d][0] = max(max(dp[d+1][0], dp[d+1][1]), max(dp[d+1][2], dp[d+1][3]));
		dp[d][1] = dp[d+1][0]+1;
		dp[d][2] = max(dp[d+1][0], dp[d+1][1])+1;
		dp[d][3] = dp[d+1][0]+2;
	} else if (l && r && radj.size() == 2 && ladj.size() == 1) {
		if (radj[1] == ladj[0]) swap(radj[0], radj[1]);
		comp(d+1, radj[0], radj[1]);
		dp[d][0] = max(max(dp[d+1][0], dp[d+1][1]), max(dp[d+1][2], dp[d+1][3]));
		dp[d][1] = max(dp[d+1][0], dp[d+1][2])+1;
		dp[d][2] = dp[d+1][0]+1;
		dp[d][3] = dp[d+1][0]+2;
	} else if (l && r && ladj.size() == 0) {
		comp(d+1, radj[0], 0);
		dp[d][0] = max(dp[d+1][0], dp[d+1][1]);
		dp[d][1] = dp[d][0]+1;
		dp[d][2] = dp[d+1][0]+1;
		dp[d][3] = dp[d+1][0]+2;
	} else if (l && r && radj.size() == 0) {
		comp(d+1, ladj[0], 0);
		dp[d][0] = max(dp[d+1][0], dp[d+1][1]);
		dp[d][1] = dp[d+1][0]+1;
		dp[d][2] = dp[d][0]+1;
		dp[d][3] = dp[d+1][0]+2;
	} else if (l && !r && ladj.size() == 2) {
		comp(d+1, ladj[0], ladj[1]);
		dp[d][0] = max(max(dp[d+1][0], dp[d+1][1]), max(dp[d+1][2], dp[d+1][3]));
		dp[d][1] = dp[d+1][0]+1;
	} else if (l && !r && ladj.size() == 1) {
		comp(d+1, ladj[0], 0);
		dp[d][0] = max(dp[d+1][0], dp[d+1][1]);
		dp[d][1] = dp[d+1][0]+1;
	}
}

int main() {
	scanf("%d%d", &R, &C);
	assert(R <= 2999 && C <= 2999);
	for (int i = 0; i < R; i++) {
		char A;
		scanf("\n");
		for (int j = 0; j < C; j++) {
			scanf("%c", &A);
			if (A == 'G') G[i][j] = 1;
			if (A == 'W') G[i][j] = 2;
		}
	}
	for (int i = 0; i < R; i++) {
		for (int j = 0; j < C; j++) {
			if (i < R-2 && G[i][j] == 0 && G[i+1][j] == 1 && G[i+2][j] == 2)
				f[i][j][1] = 1;
			if (j < C-2 && G[i][j] == 0 && G[i][j+1] == 1 && G[i][j+2] == 2)
				f[i][j][0] = 1;
		}
	}
	for (int i = 0; i < R; i++) {
		for (int j = 0; j < C; j++) {
			for (int k = 0; k < 2; k++) {
				if (!id[i][j][k] && f[i][j][k]) {
					dfs(0, i, j, k);
					comp(0, adj[0].back(), 0);
					ans += max(dp[0][0], dp[0][1]);
				}
			}
		}
	}
	printf("%d\n", ans);
}

Compilation message

dango_maker.cpp: In function 'int main()':
dango_maker.cpp:94:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d", &R, &C);
  ~~~~~^~~~~~~~~~~~~~~~
dango_maker.cpp:98:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("\n");
   ~~~~~^~~~~~
dango_maker.cpp:100:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    scanf("%c", &A);
    ~~~~~^~~~~~~~~~

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 217 ms 214008 KB Output is correct
2 Correct 190 ms 214136 KB Output is correct
3 Correct 184 ms 213980 KB Output is correct
4 Correct 192 ms 214164 KB Output is correct
5 Correct 203 ms 214172 KB Output is correct
6 Correct 194 ms 214136 KB Output is correct
7 Correct 202 ms 214144 KB Output is correct
8 Correct 198 ms 214136 KB Output is correct
9 Correct 227 ms 214008 KB Output is correct
10 Correct 196 ms 214084 KB Output is correct
11 Correct 206 ms 214192 KB Output is correct
12 Correct 217 ms 214008 KB Output is correct
13 Correct 205 ms 214008 KB Output is correct
14 Correct 203 ms 214132 KB Output is correct
15 Correct 194 ms 214104 KB Output is correct
16 Correct 196 ms 214088 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 217 ms 214008 KB Output is correct
2 Correct 190 ms 214136 KB Output is correct
3 Correct 184 ms 213980 KB Output is correct
4 Correct 192 ms 214164 KB Output is correct
5 Correct 203 ms 214172 KB Output is correct
6 Correct 194 ms 214136 KB Output is correct
7 Correct 202 ms 214144 KB Output is correct
8 Correct 198 ms 214136 KB Output is correct
9 Correct 227 ms 214008 KB Output is correct
10 Correct 196 ms 214084 KB Output is correct
11 Correct 206 ms 214192 KB Output is correct
12 Correct 217 ms 214008 KB Output is correct
13 Correct 205 ms 214008 KB Output is correct
14 Correct 203 ms 214132 KB Output is correct
15 Correct 194 ms 214104 KB Output is correct
16 Correct 196 ms 214088 KB Output is correct
17 Correct 204 ms 214116 KB Output is correct
18 Correct 201 ms 214136 KB Output is correct
19 Correct 235 ms 214132 KB Output is correct
20 Correct 214 ms 214264 KB Output is correct
21 Correct 204 ms 214136 KB Output is correct
22 Correct 216 ms 214140 KB Output is correct
23 Correct 199 ms 214192 KB Output is correct
24 Correct 190 ms 214072 KB Output is correct
25 Correct 208 ms 214032 KB Output is correct
26 Correct 207 ms 214084 KB Output is correct
27 Correct 202 ms 214232 KB Output is correct
28 Correct 203 ms 214196 KB Output is correct
29 Correct 209 ms 214312 KB Output is correct
30 Correct 202 ms 214104 KB Output is correct
31 Correct 190 ms 214008 KB Output is correct
32 Correct 217 ms 214232 KB Output is correct
33 Correct 222 ms 214348 KB Output is correct
34 Correct 211 ms 214212 KB Output is correct
35 Correct 190 ms 214252 KB Output is correct
36 Correct 201 ms 214184 KB Output is correct
37 Correct 238 ms 214236 KB Output is correct
38 Correct 205 ms 214276 KB Output is correct
39 Correct 197 ms 214248 KB Output is correct
40 Correct 190 ms 214136 KB Output is correct
41 Correct 211 ms 214384 KB Output is correct
42 Correct 204 ms 214264 KB Output is correct
43 Correct 200 ms 214140 KB Output is correct
44 Correct 206 ms 214136 KB Output is correct
45 Correct 215 ms 214172 KB Output is correct
46 Correct 231 ms 214148 KB Output is correct
47 Correct 202 ms 214200 KB Output is correct
48 Correct 195 ms 214248 KB Output is correct
49 Correct 215 ms 214120 KB Output is correct
50 Correct 220 ms 214264 KB Output is correct
51 Correct 222 ms 214308 KB Output is correct
52 Correct 235 ms 214128 KB Output is correct
53 Correct 221 ms 214192 KB Output is correct

Subtask #3
0 / 67.0

# Verdict Execution time Memory Grader output
1 Correct 217 ms 214008 KB Output is correct
2 Correct 190 ms 214136 KB Output is correct
3 Correct 184 ms 213980 KB Output is correct
4 Correct 192 ms 214164 KB Output is correct
5 Correct 203 ms 214172 KB Output is correct
6 Correct 194 ms 214136 KB Output is correct
7 Correct 202 ms 214144 KB Output is correct
8 Correct 198 ms 214136 KB Output is correct
9 Correct 227 ms 214008 KB Output is correct
10 Correct 196 ms 214084 KB Output is correct
11 Correct 206 ms 214192 KB Output is correct
12 Correct 217 ms 214008 KB Output is correct
13 Correct 205 ms 214008 KB Output is correct
14 Correct 203 ms 214132 KB Output is correct
15 Correct 194 ms 214104 KB Output is correct
16 Correct 196 ms 214088 KB Output is correct
17 Correct 204 ms 214116 KB Output is correct
18 Correct 201 ms 214136 KB Output is correct
19 Correct 235 ms 214132 KB Output is correct
20 Correct 214 ms 214264 KB Output is correct
21 Correct 204 ms 214136 KB Output is correct
22 Correct 216 ms 214140 KB Output is correct
23 Correct 199 ms 214192 KB Output is correct
24 Correct 190 ms 214072 KB Output is correct
25 Correct 208 ms 214032 KB Output is correct
26 Correct 207 ms 214084 KB Output is correct
27 Correct 202 ms 214232 KB Output is correct
28 Correct 203 ms 214196 KB Output is correct
29 Correct 209 ms 214312 KB Output is correct
30 Correct 202 ms 214104 KB Output is correct
31 Correct 190 ms 214008 KB Output is correct
32 Correct 217 ms 214232 KB Output is correct
33 Correct 222 ms 214348 KB Output is correct
34 Correct 211 ms 214212 KB Output is correct
35 Correct 190 ms 214252 KB Output is correct
36 Correct 201 ms 214184 KB Output is correct
37 Correct 238 ms 214236 KB Output is correct
38 Correct 205 ms 214276 KB Output is correct
39 Correct 197 ms 214248 KB Output is correct
40 Correct 190 ms 214136 KB Output is correct
41 Correct 211 ms 214384 KB Output is correct
42 Correct 204 ms 214264 KB Output is correct
43 Correct 200 ms 214140 KB Output is correct
44 Correct 206 ms 214136 KB Output is correct
45 Correct 215 ms 214172 KB Output is correct
46 Correct 231 ms 214148 KB Output is correct
47 Correct 202 ms 214200 KB Output is correct
48 Correct 195 ms 214248 KB Output is correct
49 Correct 215 ms 214120 KB Output is correct
50 Correct 220 ms 214264 KB Output is correct
51 Correct 222 ms 214308 KB Output is correct
52 Correct 235 ms 214128 KB Output is correct
53 Correct 221 ms 214192 KB Output is correct
54 Runtime error 556 ms 263168 KB Execution killed with signal 11 (could be triggered by violating memory limits)
55 Halted 0 ms 0 KB -