Submission #834896

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
834896	2023-08-22 23:06:02	Username4132	Thousands Islands (IOI22_islands)	C++17	35 / 100	52 ms	21696 KiB

islands

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#include "islands.h"
#include <variant>
#include<iostream>
#include <vector>
#include<cassert>
using namespace std;
using pii = pair<int, int>;
#define forn(i, n) for(int i=0; i<(int)n; ++i)
#define PB push_back
#define F first
#define S second
const int MAXN = 100010;
int n, m, cur, stpos[MAXN];
bool vis[MAXN], blocked[MAXN], inst[MAXN];
vector<int> st, se;
vector<pii> g[MAXN];
bool dfs2(int v){
  inst[v]=true;
  vis[v]=true;
  for(pii to:g[v]) if(!vis[to.F] && !blocked[to.F]) {
    bool ret = dfs2(to.F);
    if(ret) return true;
  }
  else if((inst[to.F] || stpos[to.F]!=-1) && !blocked[to.F] && to.S != se[cur]){
    return true;
  }
  inst[v]=false;
 
 
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• Subtask 1: 1.75 / 5
• Subtask 2: 1.75 / 5
• Subtask 3: 7.35 / 21
• Subtask 4: 8.399999999999999 / 24
• Subtask 5: 15.749999999999998 / 45