Submission #1092212

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
1092212	2024-09-23T15:00:22 Z	brinton	Tracks in the Snow (BOI13_tracks)	C++14	46.7708 / 100	2000 ms	1048576 KB

tracks

#include <bits/stdc++.h>
using namespace std;
int H,W;
void dfs(int r,int c,vector<vector<int>>& matrix,vector<vector<int>>& minDist){
	// cout << r << " " << c << endl;
	int dx[4] = {0,1,-1,0};
	int dy[4] = {1,0,0,-1};
	for(int i = 0;i < 4;i++){
		int newX = r+dx[i];
		int newY = c+dy[i];
		if(newX < 0 || newY < 0 || newX >= H || newY >= W){
			continue;
		}
		if(matrix[newX][newY] == 0)continue;
		int newDist = minDist[r][c];
		if(matrix[newX][newY] != matrix[r][c]){
			newDist++;
		}
		if(minDist[newX][newY] > newDist){
			minDist[newX][newY] = newDist;
			dfs(newX,newY,matrix,minDist);
		}
	}
}
int main(){
    cin.tie(0);
    ios_base::sync_with_stdio(0);
    //start here
    
    cin >> H >> W;
    vector<vector<int>> matrix(H,vector<int>(W,0));
    
    for(int i = 0;i < H;i++){
    	for(int j = 0; j < W;j++){
    		char tmp;
    		cin >> tmp;
    		if(tmp == 'F'){
    			matrix[i][j] = 1;
    		}else if(tmp == 'R'){
    			matrix[i][j] = 2;
    		}
    	}
    }
    vector<vector<int>> min_dist(H,vector<int>(W,INT_MAX));
    int ans = 0;
    min_dist[0][0] = 1;
    dfs(0,0,matrix,min_dist);
    for(int i = 0; i < H;i++){
    	for(int j = 0; j < W;j++){
    		if(matrix[i][j] != 0){
    			ans = max(min_dist[i][j],ans);
    			// cout << min_dist[i][j] << " ";
    		}
    		// else{
    			// cout << 0 << " ";
    		// }
    	}
    	// cout << endl;
    }
    cout << ans;
}

Subtask #1

18.3333333333 / 30.0

#	Verdict	Execution time	Memory	Grader output
1	Execution timed out	2052 ms	31316 KB	Time limit exceeded
2	Correct	0 ms	348 KB	Output is correct
3	Correct	2 ms	348 KB	Output is correct
4	Execution timed out	2092 ms	20828 KB	Time limit exceeded
5	Correct	469 ms	2384 KB	Output is correct
6	Correct	1 ms	348 KB	Output is correct
7	Correct	2 ms	348 KB	Output is correct
8	Correct	30 ms	860 KB	Output is correct
9	Correct	3 ms	672 KB	Output is correct
10	Correct	749 ms	2200 KB	Output is correct
11	Correct	1177 ms	5808 KB	Output is correct
12	Execution timed out	2059 ms	11220 KB	Time limit exceeded
13	Correct	469 ms	2416 KB	Output is correct
14	Correct	495 ms	2168 KB	Output is correct
15	Execution timed out	2045 ms	13904 KB	Time limit exceeded
16	Execution timed out	2037 ms	31312 KB	Time limit exceeded
17	Execution timed out	2044 ms	12636 KB	Time limit exceeded
18	Execution timed out	2047 ms	20828 KB	Time limit exceeded

Subtask #2

28.4375 / 70.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	3 ms	2908 KB	Output is correct
2	Execution timed out	2086 ms	44480 KB	Time limit exceeded
3	Execution timed out	2081 ms	421972 KB	Time limit exceeded
4	Execution timed out	2045 ms	78416 KB	Time limit exceeded
5	Correct	527 ms	640952 KB	Output is correct
6	Runtime error	893 ms	1048576 KB	Execution killed with signal 9
7	Correct	3 ms	2136 KB	Output is correct
8	Correct	2 ms	2904 KB	Output is correct
9	Correct	1401 ms	3676 KB	Output is correct
10	Correct	1 ms	1368 KB	Output is correct
11	Correct	2 ms	1628 KB	Output is correct
12	Correct	1 ms	1884 KB	Output is correct
13	Execution timed out	2069 ms	44372 KB	Time limit exceeded
14	Execution timed out	2052 ms	26708 KB	Time limit exceeded
15	Correct	44 ms	44964 KB	Output is correct
16	Execution timed out	2043 ms	23896 KB	Time limit exceeded
17	Execution timed out	2055 ms	105552 KB	Time limit exceeded
18	Correct	174 ms	173720 KB	Output is correct
19	Execution timed out	2059 ms	78412 KB	Time limit exceeded
20	Execution timed out	2040 ms	92172 KB	Time limit exceeded
21	Execution timed out	2053 ms	244048 KB	Time limit exceeded
22	Correct	634 ms	643156 KB	Output is correct
23	Execution timed out	2081 ms	198996 KB	Time limit exceeded
24	Correct	438 ms	456200 KB	Output is correct
25	Correct	840 ms	712532 KB	Output is correct
26	Runtime error	716 ms	1048576 KB	Execution killed with signal 9
27	Runtime error	872 ms	1048576 KB	Execution killed with signal 9
28	Runtime error	844 ms	1048576 KB	Execution killed with signal 9
29	Runtime error	834 ms	1048576 KB	Execution killed with signal 9
30	Runtime error	790 ms	1048576 KB	Execution killed with signal 9
31	Runtime error	839 ms	1048576 KB	Execution killed with signal 9
32	Runtime error	829 ms	1048576 KB	Execution killed with signal 9