CSES - Datatähti 2022 alku - Results
Submission details
Task:Tietoverkko
Sender:mooc.fi~486604
Submission time:2021-10-06 14:44:49 +0300
Language:C++ (C++11)
Status:READY
Result:25
Feedback
groupverdictscore
#1ACCEPTED10
#2ACCEPTED15
#30
Test results
testverdicttimegroup
#1ACCEPTED0.01 s1, 2, 3details
#2ACCEPTED0.08 s2, 3details
#3--3details

Code

#include <iostream>
#include <vector>
#include <map>

using namespace std; 
int N;
vector<pair<long long int,long long int>> v[200001]; 
long long int sum;
bool tama=false; 
map<pair<long long int, long long int>, short int > juu; 
//vector<int> kerro;
long long int globalsum=0; 
long long int valisum=0; 

long long int haku(long long int s, long long int e,long long int target){

    long long int ssumma=1; 

    for(auto u: v[s]){
        if(u.first!=e&&u.second==target){
            
            juu[{s, u.first}]=1;
            int uusi = haku(u.first, s, target);
            valisum+=globalsum*uusi; 
            globalsum+=uusi; 
            tama=true; }
      
        if(u.first!=e&&u.second>target) ssumma+=haku(u.first, s, target);
}
return ssumma; 
}


int main()
{     
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);  
    long long int a,b,c;
    int i; 
    sum=0; 
    cin>>N; 
    long long int di[N][3]; //a ja b pitää olla long long, mutta miksi?
    for(i=0; i<N-1; i++){
        cin>>a>>b>>c;
        di[i][0]=c;
        di[i][1]=a;
        di[i][2]=b;
        v[a].push_back({b,c});
        v[b].push_back({a,c}); 
     
    }
    long long int vasen, oikea; 
    long long int kl0, kl1, kl2; 
    for(i=0; i<N-1; i++){
        kl0 = di[i][0]; 
        kl1 = di[i][1];
        kl2 = di[i][2];
        if(juu[{kl2,kl1}]||juu[{kl1,kl2}])
            continue;
       
        vasen=haku(kl1, kl2 , kl0);
        oikea=haku(kl2, kl1, kl0);
        juu[{kl2, kl1}]=1;
        if(tama){
            valisum+=globalsum*vasen;
            globalsum+=vasen; 
            valisum+=globalsum*oikea;
            sum+=valisum*kl0;

            /*kerro.push_back(vasen);
            kerro.push_back(oikea);
            long long  int maara=kerro.size();
            for(int ri=0; ri<maara; ri++){
         
                for( int rj=ri; rj<maara; rj++){
                    if(ri==rj) continue;
                  
                    sum+=kl0*kerro[ri]*kerro[rj];  }
                     }*/
            tama=false;
            globalsum=0; 
            valisum=0; 
            //kerro.clear();
            continue;
        }
       
        sum+= kl0*vasen*oikea;
    }


    cout<<sum;

  
    return 0;
}

Test details

Test 1

Group: 1, 2, 3

Verdict: ACCEPTED

input
100
1 2 74
1 3 100
2 4 50
3 5 40
...

correct output
88687

user output
88687

Test 2

Group: 2, 3

Verdict: ACCEPTED

input
5000
1 2 613084013
1 3 832364259
2 4 411999902
3 5 989696303
...

correct output
1103702320243776

user output
1103702320243776

Test 3

Group: 3

Verdict:

input
200000
1 2 613084013
1 3 832364259
2 4 411999902
3 5 989696303
...

correct output
1080549209850010931

user output
(empty)