Submission #113058

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
113058	2019-05-23 13:14:05	maruii	Synchronization (JOI13_synchronization)	C++14	100 / 100	269 ms	17912 KiB

synchronization

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#include <bits/stdc++.h>
using namespace std;
vector<int> edge[100001];
int dfn[100001], efn[100001], ifn[100001], dfnn;
void dfs(int x, int p) {
  dfn[x] = ++dfnn;
  ifn[dfnn] = x;
  for (auto i: edge[x]) {
    if (i != p) dfs(i, x);
  }
  efn[x] = dfnn;
}
const int SIZE = 1 << 17;
struct ST {
  int V[SIZE << 1];
  
  void init(int nn, int s, int e) {
    if (s == e) {
      V[nn] = efn[ifn[s]];
      return;
    }
    int m = s + e >> 1;
    init(nn << 1, s, m);
    init(nn << 1 | 1, m + 1, e);
    V[nn] = max(V[nn << 1], V[nn << 1 | 1]);
  }
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
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Compilation message (stderr)

synchronization.cpp: In member function 'void ST::init(int, int, int)':
synchronization.cpp:25:13: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   int m = s + e >> 1;
           ~~^~~
synchronization.cpp: In member function 'void ST::update(int, int, int, int, int)':
synchronization.cpp:37:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   int m = ns + ne >> 1;
           ~~~^~~~
synchronization.cpp: In member function 'int ST::query(int, int, int, int, int)':
synchronization.cpp:46:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   int m = ns + ne >> 1;
           ~~~^~~~

• Subtask 1: 10 / 10
• Subtask 2: 20 / 20
• Subtask 3: 10 / 10
• Subtask 4: 20 / 20
• Subtask 5: 40 / 40