What doe the following code mean ? Why use it ?
#ifdef _DEBUG
freopen("input.txt", "r", stdin);
// freopen("output.txt", "w", stdout);
#endif
# | User | Rating |
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1 | tourist | 4009 |
2 | jiangly | 3773 |
3 | Radewoosh | 3646 |
4 | ecnerwala | 3624 |
5 | jqdai0815 | 3620 |
5 | Benq | 3620 |
7 | orzdevinwang | 3612 |
8 | Geothermal | 3569 |
8 | cnnfls_csy | 3569 |
10 | Um_nik | 3396 |
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1 | Um_nik | 163 |
2 | cry | 161 |
3 | maomao90 | 160 |
4 | -is-this-fft- | 159 |
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6 | atcoder_official | 157 |
7 | adamant | 155 |
7 | nor | 155 |
9 | maroonrk | 152 |
10 | Dominater069 | 148 |
What doe the following code mean ? Why use it ?
#ifdef _DEBUG
freopen("input.txt", "r", stdin);
// freopen("output.txt", "w", stdout);
#endif
bool dfs(int r, int c) {
if (r > n || c > m || vis[ndx(r, c)] || grid[ndx(r,c)] == '#') return false;
if (r == n && c == m) return true;
if (r!=1 || c!=1) vis[ndx(r, c)] = true;
return dfs(r+1, c) || dfs(r, c+1);
}
Why Does the previous code terminate once a call is evaluated as true ?
In other words, Why it doesn't mark each reachable cell that does not have "#", as expected ?
How can I find all Div 3 contests ?
When I choose Clang++17 Diagnostics and submit this solution, The verdict is TLE. But
when I choose any GNU G++ and submit the exact same code, It's Accepted.
why ?
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