Submission #805667

#	Time	Username	Problem	Language	Result	Execution time	Memory
805667		HD1	Monthly railway pass (LMIO18_menesinis_bilietas)	C++14	30 / 100	3084 ms	54792 KiB

menesinis_bilietas

// we all are lost trying to be someone.
#include <bits/stdc++.h>
#define fastio ios_base::sync_with_studio(0); cin.tie(0);
#define sz(x) int(x.size())
#define all(x) x.begin(),x.end()
#define rall(x) x.rbegin(),x.rend()
#define pb push_back
#define ss second
#define ff first
using namespace std;
typedef long long ll;
typedef long double ld;
typedef pair<ll,ll> ii;
const int MAX=1e6;
const int inf=1e9;
const int mod=1e9+7;
vector<ii>gfo[MAX];
ll dist[MAX];
void dikstra(ll ini){
    set<ii> q;
    q.insert({0,ini});
    dist[ini]=0;
    while(sz(q)){
        ii x=*q.begin();
        q.erase(q.begin());
        ll u=x.ss;
        ll dist_u=x.ff;
        if(dist[u]!=dist_u) continue;
        for(auto y:gfo[u]){
            ll v=y.ff;
            ll w=y.ss;
            if(dist[v]>dist[u]+w){
                dist[v]=dist[u]+w;
                q.insert({dist[v],v});
            }
        }
    }
}
void coso(ll n){
    for(int i=0; i<=n; i++){
        dist[i]=inf;
    }
    return;
}
void solve(){
    ll n, m, u, v;
    char x;
    cin>>n>>m;
    for(ll i=0; i<m; i++){
        cin>>u>>v>>x;
        if(x=='A'){
            gfo[u].pb({v,1});
            gfo[v].pb({u,1});
        }
        else{
            gfo[u].pb({v,0});
            gfo[v].pb({u,0});
        }
    }
    ll ans=0;
    for(ll i=1; i<=n; i++){
        coso(n);
        dikstra(i);
        ll cont=0;
        for(ll j=1; j<=n; j++){
            if(dist[j]<=1)cont++;
        }
        if(cont==n)ans++;
    }
    cout<<ans<<endl;
    return;
}
int main(){
    solve();
    return 0;
}

• Subtask 1: 0 / 10
• Subtask 2: 0 / 6
• Subtask 3: 30 / 30
• Subtask 4: 0 / 35
• Subtask 5: 0 / 19