Submission #222455

#	Time	Username	Problem	Language	Result	Execution time	Memory
222455		errorgorn	Checker (COCI19_checker)	C++14	0 / 110	10 ms	9728 KiB

checker

#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define ii pair<ll,ll>
#define iii pair<ii,ll>
//#define endl '\n'

int n;
string sides;

set<int> al[200005];

struct trip{
	int a,b,c;
	
	trip (int _a,int _b,int _c){
		a=_a,b=_b,c=_c;
	}
	
};

vector<trip> tri;
map<ii,char> color;

ii start=ii(-1,-1);

bool dfs(int i,int j){ 
	//cout<<i<<" "<<j<<endl;
	//note here that it returns true if triangulation does not exist
	
	if ((j+1)%n==i){
		al[i].erase(j);
		al[j].erase(i);
		return false;
	}
	else{
		auto curr=al[i].find(j);
		auto it=(curr==(--al[i].end()))?al[i].begin():next(curr);
		
		//cout<<"DEBUG: "<<i<<" "<<*it<<" "<<j<<endl;
		tri.push_back(trip(i,j,*it));
		
		if (i<j && i<*it && *it<j) return true;
		if (j<i && (i<*it || *it<j)) return true;
	
		
		al[i].erase(j);
		al[j].erase(i);
		
		if (dfs(i,*it)||dfs(*it,j)) return true;
		
		return false;
	}
	
}

int main(){
	
	cout<<"neispravna triangulacija";
	
}

//neispravna triangulacija -2
//neispravno bojenje -1
//tocno 0

• Subtask 1: 0 / 12
• Subtask 2: 0 / 17
• Subtask 3: 0 / 23
• Subtask 4: 0 / 23
• Subtask 5: 0 / 35