Cod sursa(job #2909045)

Utilizator rares89_Dumitriu Rares rares89_ Data 8 iunie 2022 14:49:02
Problema Andrei Scor 50
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 1.46 kb
#include <fstream>
#include <vector>
#include <stack>

using namespace std;

ifstream fin("andrei.in");
ofstream fout("andrei.out");

int n, m, x, y, z, v[100005], cnt, ctc[100005];
vector<int> G[100005], GT[100005];
stack<int> st;

void adaugare(int a, int b) {
    G[a].push_back(b);
    GT[b].push_back(a);
}

void dfs(int nod) {
    v[nod] = 1;
    for(auto i : G[nod]) {
        if(v[i] == 0) {
            dfs(i);
        }
    }
    st.push(nod);
}

void dfsT(int nod) {
    v[nod] = 2;
    ctc[nod] = cnt;
    for(auto i : GT[nod]) {
        if(v[i] == 1) {
            dfsT(i);
        }
    }
}

void kosaraju() {
    for(int i = 1; i <= 2 * n; i++) {
        if(v[i] == 0) {
            dfs(i);
        }
    }
    while(!st.empty()) {
        int nod = st.top();
        if(v[nod] == 1) {
            cnt++;
            dfsT(nod);
        }
        st.pop();
    }
}

int main() {
    fin >> n >> m;
    for(; m; m--) {
        fin >> x >> y >> z;
        if(z == 0) {
            adaugare(x, y + n);
            adaugare(y, x + n);
        } else if(z == 1) {
            adaugare(x + n, y);
            adaugare(y + n, x);
        } else if(z == 2) {
            adaugare(x, y); adaugare(y, x);
            adaugare(x + n, y + n); adaugare(y + n, x + n);
        }
    }
    fin.close();
    kosaraju();
    for(int i = 1; i <= n; i++) {
        fout << (ctc[i] < ctc[i + n]) << " ";
    }
    return 0;
}