Submission #942122

#	Time	Username	Problem	Language	Result	Execution time	Memory
942122		Mathias	Monthly railway pass (LMIO18_menesinis_bilietas)	C++14	100 / 100	347 ms	52672 KiB

menesinis_bilietas

#include <bits/stdc++.h>
using namespace std;
const int MAXN = 5e5+7;
vector<int>g[MAXN];
vector<pair<int,int> >bus;
int sajz[MAXN],res[MAXN],t[MAXN];
map<pair<int,int>, bool> w;
int ans,cnt;
void DFS(int x,int nr){
	t[x]=nr;
	//cout<<x<<' ';
	sajz[nr]++;
	for(auto s:g[x]) if(!t[s]) DFS(s,nr);
}
int main(){
	ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
	int n,m,s1,s2,a,b; char c;
	cin>>n>>m;
	for(int i=1;i<=m;i++){
		cin>>a>>b>>c;
		if(c=='T'){
			g[a].push_back(b); g[b].push_back(a);
		}
		else bus.push_back({a,b});
	}
	for(int i=1;i<=n;i++){
		if(t[i]==0){
			//cout<<"\ni="<<i<<'\n';
			DFS(i,++cnt);
		}
	}
	for(auto k:bus){
		s1=t[k.first]; s2=t[k.second];
		if(s1!=s2 and w[{min(s1,s2),max(s1,s2)}]==0){
			res[s1]++; res[s2]++;
			w[{min(s1,s2),max(s1,s2)}]=1;
		}
	}
	for(int i=1;i<=cnt;i++){
		if(res[i]==cnt-1){
			//cout<<i<<' '<<sajz[i]<<'\n';
			ans+=sajz[i];
		}
	}
	cout<<ans<<'\n';
	return 0;
}

• Subtask 1: 10 / 10
• Subtask 2: 6 / 6
• Subtask 3: 30 / 30
• Subtask 4: 35 / 35
• Subtask 5: 19 / 19