Submission #828928

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
828928	2023-08-17 20:44:08	QwertyPi	The Xana coup (BOI21_xanadu)	C++14	100 / 100	96 ms	18860 KiB

xanadu

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#include <bits/stdc++.h>
#pragma GCC optimize("unroll-loops")
#pragma GCC optimize("Ofast")
#define int long long
using namespace std;
const int N = 1e5 + 11;
const int INF = 1 << 30;
int dp[N][2][2];
vector<int> G[N];
int a[N];
int chmin(int& x, int y){
  x = min(x, y); return x;
}
void dfs(int v, int pa = -1){
  int ch = 0;
  int d[2][2] = {{INF, INF}, {INF, INF}};
  for(auto u : G[v]){
    if(u == pa) continue; ch++; dfs(u, v);
  }
  for(int x = 0; x < 2; x++){
    int b[2][2] = {{0, INF}, {INF, INF}};
    for(auto u : G[v]){
      if(u == pa) continue;
      for(int z = 0; z < 2; z++){
        for(int y = 0; y < 2; y++){
          chmin(b[1][(z + y) % 2], b[0][z] + dp[u][x][y]);
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
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Compilation message (stderr)

xanadu.cpp: In function 'void dfs(long long int, long long int)':
xanadu.cpp:21:3: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
   21 |   if(u == pa) continue; ch++; dfs(u, v);
      |   ^~
xanadu.cpp:21:25: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
   21 |   if(u == pa) continue; ch++; dfs(u, v);
      |                         ^~
xanadu.cpp:19:6: warning: unused variable 'd' [-Wunused-variable]
   19 |  int d[2][2] = {{INF, INF}, {INF, INF}};
      |      ^

• Subtask 1: 5 / 5
• Subtask 2: 15 / 15
• Subtask 3: 10 / 10
• Subtask 4: 40 / 40
• Subtask 5: 30 / 30