Submission #76040

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
76040	2018-09-12 00:25:36	tmwilliamlin168	Tracks in the Snow (BOI13_tracks)	C++14	100 / 100	1204 ms	901464 KiB

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#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);
  
 
 
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Compilation message (stderr)

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) {
                                     ^

• Subtask 1: 30 / 30
• Subtask 2: 70 / 70