oj.uz

Submission #940532

# Submission time Handle Problem Language Result Execution time Memory
940532 2024-03-07T10:20:05 Z Reverberate Tracks in the Snow (BOI13_tracks) C++14
100 / 100
 558 ms 247844 KB 
#include <bits/stdc++.h>
using namespace std;
#define int long long
#define MAXN 4002

int dx[4]{1, -1, 0, 0}, dy[4]{0, 0, 1, -1};

int n, m, depth[MAXN][MAXN], ans = 1;
char snow[MAXN][MAXN];

bool inside(int x, int y) {
	return (x > -1 && x < n && y > -1 && y < m && snow[x][y] != '.');
}

signed main(){
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	cin>>n>>m;
	for(int i=0;i<n;i++){
		for(int j=0;j<m;j++){
			cin>>snow[i][j];
		}
	}
	memset(depth,0,sizeof(depth));
	deque<pair<int,int>>dq;
	dq.push_back({0,0});
	depth[0][0]=1;
	while(!dq.empty()){
		auto curr = dq.front();
		int r = curr.first, c = curr.second;
		dq.pop_front();
		ans = max(ans,depth[r][c]);
		for(int i=0;i<4;i++){
			int nr = r+dx[i], nc = c+dy[i];
			if(inside(nr,nc)&&depth[nr][nc]==0){
				if(snow[r][c]==snow[nr][nc]){
					depth[nr][nc] = depth[r][c];
					dq.push_front({nr,nc});
				}
				else{
					depth[nr][nc] = depth[r][c]+1;
					dq.push_back({nr,nc});
				}
			}
		}
	}
	cout<<ans;
}

Subtask #1
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 31 ms 129372 KB Output is correct
2 Correct 20 ms 126836 KB Output is correct
3 Correct 17 ms 129108 KB Output is correct
4 Correct 22 ms 129616 KB Output is correct
5 Correct 19 ms 129172 KB Output is correct
6 Correct 17 ms 126816 KB Output is correct
7 Correct 17 ms 128992 KB Output is correct
8 Correct 16 ms 129116 KB Output is correct
9 Correct 18 ms 129120 KB Output is correct
10 Correct 19 ms 129116 KB Output is correct
11 Correct 19 ms 129116 KB Output is correct
12 Correct 22 ms 129216 KB Output is correct
13 Correct 19 ms 129136 KB Output is correct
14 Correct 17 ms 129124 KB Output is correct
15 Correct 26 ms 129468 KB Output is correct
16 Correct 26 ms 129372 KB Output is correct
17 Correct 27 ms 129372 KB Output is correct
18 Correct 21 ms 129624 KB Output is correct

Subtask #2
70.0 / 70.0

# Verdict Execution time Memory Grader output
1 Correct 23 ms 141484 KB Output is correct
2 Correct 52 ms 134228 KB Output is correct
3 Correct 246 ms 149732 KB Output is correct
4 Correct 82 ms 137320 KB Output is correct
5 Correct 172 ms 143956 KB Output is correct
6 Correct 556 ms 177392 KB Output is correct
7 Correct 21 ms 141404 KB Output is correct
8 Correct 20 ms 141392 KB Output is correct
9 Correct 18 ms 127072 KB Output is correct
10 Correct 19 ms 126804 KB Output is correct
11 Correct 19 ms 141404 KB Output is correct
12 Correct 20 ms 129116 KB Output is correct
13 Correct 51 ms 134228 KB Output is correct
14 Correct 37 ms 132184 KB Output is correct
15 Correct 37 ms 131932 KB Output is correct
16 Correct 33 ms 129668 KB Output is correct
17 Correct 101 ms 137556 KB Output is correct
18 Correct 95 ms 137740 KB Output is correct
19 Correct 88 ms 137264 KB Output is correct
20 Correct 71 ms 137296 KB Output is correct
21 Correct 154 ms 144236 KB Output is correct
22 Correct 177 ms 143976 KB Output is correct
23 Correct 187 ms 141392 KB Output is correct
24 Correct 148 ms 144032 KB Output is correct
25 Correct 478 ms 149668 KB Output is correct
26 Correct 349 ms 247844 KB Output is correct
27 Correct 423 ms 202852 KB Output is correct
28 Correct 558 ms 176884 KB Output is correct
29 Correct 550 ms 173492 KB Output is correct
30 Correct 510 ms 185032 KB Output is correct
31 Correct 444 ms 147712 KB Output is correct
32 Correct 395 ms 180204 KB Output is correct