100mil's blog

If anyone could help me as to why the way I use BFS always ends up getting TLE.
By 100mil, history, 4 years ago, In English

I was solving this problem-https://mirror.codeforces.com/problemset/problem/1613/E This is my solution-https://mirror.codeforces.com/contest/1613/submission/138713743 Can pls someone tell me what is wrong here.

Tags bfs
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  • +6
  • Vote: I do not like it

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4 years ago, hide # |
 
Vote: I like it +2 Vote: I do not like it

The problem is in your check function, you are copying a (vector<char> v )and (vector<vector<int>> vis) every time you call check function. To avoid this make v and vis vector global.

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4 years ago, hide # |
 
Vote: I like it +6 Vote: I do not like it

The problem in this line:

bool check(int i,int j,vector<vector<char>> v,vector<vector<int>> vis)

Your vector<vector<char>> v and vector<vector<int>> vis are copied every time, when you call this function. Instead you should write somthing like: bool check(int i,int j,vector<vector<char>> &v,vector<vector<int>> &vis)

there is your AC solution with this fix 138716320

And write "\n" instead endl, because endl flushing output, what takes time (sorry for my bad english)

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