답안 #76040

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
76040 2018-09-12T00:25:36 Z tmwilliamlin168 Tracks in the Snow (BOI13_tracks) C++14
100 / 100
1204 ms 901464 KB
#include <bits/stdc++.h>
using namespace std;

const int mxN=4e3;
int n, m, ans, nb[4][2]={{1, 0}, {0, 1}, {-1, 0}, {0, -1}};
string g[mxN];
vector<array<int, 2>> tp[2];

__attribute__((always_inline)) bool a(int i, int j) {
	return i>=0&&i<n&&j>=0&&j<m&&g[i][j]!='.';
}

void dfs(int i, int j) {
	char pc=g[i][j];
	g[i][j]='.';
	for(int k=0; k<4; ++k) {
		int ni=i+nb[k][0], nj=j+nb[k][1];
		if(!a(ni, nj))
			continue;
		if(g[ni][nj]==pc)
			dfs(ni, nj);
		else
			tp[ans&1^1].push_back({ni, nj});
	}
}

int main() {
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	
	cin >> n >> m;
	for(int i=0; i<n; ++i)
		cin >> g[i];
	tp[0].push_back({0, 0});
	for(; tp[ans&1].size(); ++ans) {
		for(array<int, 2> u : tp[ans&1])
			if(a(u[0], u[1]))
				dfs(u[0], u[1]);
		tp[ans&1].clear();
	}
	cout << ans;
}

Compilation message

tracks.cpp: In function 'void dfs(int, int)':
tracks.cpp:23:10: warning: suggest parentheses around arithmetic in operand of '^' [-Wparentheses]
    tp[ans&1^1].push_back({ni, nj});
       ~~~^~
tracks.cpp: At global scope:
tracks.cpp:9:37: warning: always_inline function might not be inlinable [-Wattributes]
 __attribute__((always_inline)) bool a(int i, int j) {
                                     ^
# 결과 실행 시간 메모리 Grader output
1 Correct 16 ms 1528 KB Output is correct
2 Correct 2 ms 1528 KB Output is correct
3 Correct 2 ms 1528 KB Output is correct
4 Correct 9 ms 2788 KB Output is correct
5 Correct 4 ms 2788 KB Output is correct
6 Correct 2 ms 2788 KB Output is correct
7 Correct 2 ms 2788 KB Output is correct
8 Correct 2 ms 2788 KB Output is correct
9 Correct 2 ms 2788 KB Output is correct
10 Correct 4 ms 2788 KB Output is correct
11 Correct 4 ms 2788 KB Output is correct
12 Correct 7 ms 2788 KB Output is correct
13 Correct 4 ms 2788 KB Output is correct
14 Correct 4 ms 2788 KB Output is correct
15 Correct 13 ms 2788 KB Output is correct
16 Correct 16 ms 3008 KB Output is correct
17 Correct 9 ms 3008 KB Output is correct
18 Correct 9 ms 4220 KB Output is correct
# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4220 KB Output is correct
2 Correct 38 ms 6108 KB Output is correct
3 Correct 198 ms 38100 KB Output is correct
4 Correct 44 ms 38100 KB Output is correct
5 Correct 153 ms 42512 KB Output is correct
6 Correct 741 ms 136248 KB Output is correct
7 Correct 4 ms 136248 KB Output is correct
8 Correct 3 ms 136248 KB Output is correct
9 Correct 4 ms 136248 KB Output is correct
10 Correct 3 ms 136248 KB Output is correct
11 Correct 3 ms 136248 KB Output is correct
12 Correct 2 ms 136248 KB Output is correct
13 Correct 37 ms 136248 KB Output is correct
14 Correct 22 ms 136248 KB Output is correct
15 Correct 15 ms 136248 KB Output is correct
16 Correct 22 ms 136248 KB Output is correct
17 Correct 106 ms 136248 KB Output is correct
18 Correct 52 ms 136248 KB Output is correct
19 Correct 42 ms 136248 KB Output is correct
20 Correct 46 ms 136248 KB Output is correct
21 Correct 114 ms 136248 KB Output is correct
22 Correct 150 ms 136248 KB Output is correct
23 Correct 191 ms 136248 KB Output is correct
24 Correct 111 ms 136248 KB Output is correct
25 Correct 259 ms 136248 KB Output is correct
26 Correct 1204 ms 901464 KB Output is correct
27 Correct 875 ms 901464 KB Output is correct
28 Correct 744 ms 901464 KB Output is correct
29 Correct 902 ms 901464 KB Output is correct
30 Correct 780 ms 901464 KB Output is correct
31 Correct 570 ms 901464 KB Output is correct
32 Correct 965 ms 901464 KB Output is correct