Submission #858812

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
858812	2023-10-09 08:25:34	iskhakkutbilim	Joker (BOI20_joker)	C++17	39 / 100	2092 ms	24144 KiB

Joker

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#include <bits/stdc++.h>
using namespace std;
 
#define ff first
#define ss second
#define all(a) a.begin(), a.end()
const int N = 2e5;
vector<pair<int, int> > g[N+1];
int n, m, q, timer = 1; 
int used[N+1], lens[N+1];
 
int Left, Right, ok; 
vector< pair<int, int> > query;
void dfs(int v, int par){
  if(ok) return;
  used[v] = timer;
  for(auto [to, idx] : g[v]){
    if(used[to] == timer &&  (idx < Left or idx > Right) && to != par){
      int len = lens[v] - lens[to] + 1;
      if(len % 2 == 1){
        ok = 1;
        return;
      }
    }else if(used[to] < timer && (idx < Left or idx > Right)){
      lens[to] = lens[v] + 1;
      dfs(to, v);
    }
  }
  used[v] = timer+1;
}
 
 
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Compilation message (stderr)

Joker.cpp:36:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   36 | main(){
      | ^~~~

• Subtask 1: 6 / 6
• Subtask 2: 8 / 8
• Subtask 3: 25 / 25
• Subtask 4: 0 / 10
• Subtask 5: 0 / 22
• Subtask 6: 0 / 29