Submission #1013184

#	Time	Username	Problem	Language	Result	Execution time	Memory
1013184		vjudge1	Checker (COCI19_checker)	C++17	110 / 110	802 ms	69548 KiB

checker

#include <bits/stdc++.h>
using namespace std;

#define ll long long
int const N=2e5+5;
int const mod=1e9+7;

int bk[N],fr[N];
vector<int> adj[N];
int n;
map<pair<int,int>,int> mp;
bool check1(){
	for(int i=1;i<n;i++)
		if(fr[i+1]+1>bk[i])
			return 0;
	if(fr[1]+1>bk[n])
		return 0;
	return 1;
}
bool is(int a,int b){
	if(mp.find({a,b})!=mp.end())
		return 1;
	return 0;
}
bool diff(int a,int b,int c){
	if(mp[{a,b}]!=mp[{b,c}] && mp[{b,c}]!=mp[{c,a}])
		return 1;
	return 0;
}
bool check2(){
	for (int i = 1; i <=n; ++i){
		int sz=adj[i].size();
		for(int j=1;j<sz;j++)
			if(is(adj[i][j-1],adj[i][j]) && diff(adj[i][j-1],i,adj[i][j])==0)
				return 0;
	}
	return 1;
}
int main(){
	int t;
	cin>>t;
	cin>>n;
	string col;
	cin>>col;
	for(int i=0;i<n-1;i++){
		mp[{i+1,i+2}]=col[i]-'0';
		mp[{i+2,i+1}]=col[i]-'0';
		adj[i].push_back(i+1);
		adj[i+1].push_back(i);
	}
	mp[{n,1}]=col[n-1]-'0';
	mp[{1,n}]=col[n-1]-'0';
	adj[n].push_back(1);
	adj[1].push_back(n);
	for(int i=1;i<=n;i++){
		fr[i]=2;
		bk[i]=n;
	}
	for (int i = 0; i < n-3; ++i)
	{
		int a,b,c;
		cin>>a>>b>>c;
		mp[{a,b}]=c;
		mp[{b,a}]=c;
		adj[a].push_back(b);
		adj[b].push_back(a);
		if(a>b)
			swap(a,b);
		int ba=(b-a)+1;
		fr[a]=max(fr[a],ba);
		bk[a]=min(bk[a],ba);
		int ab=(n+1)-(b-a);
		fr[b]=max(fr[b],ab);
		bk[b]=min(bk[b],ab);
	}
	// for (int i = 1; i <=n; ++i)
	// 	cout<<fr[i]<<' '<<bk[i]<<endl;
	if(check1()==0)
		cout<<"neispravna triangulacija"<<endl;
	else if(check2()==0)
		cout<<"neispravno bojenje"<<endl;
	else
		cout<<"tocno"<<endl;
	return 0;
}

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