CTC normal

#include <bits/stdc++.h>

using namespace std;

vector < int > G[128], GT[128], CTC[128];

int n, m, x, y, viz[128], nr;
stack < int > S;

void read () {
    cin >> n >> m;
    while (m --) {
        cin >> x >> y;
        G[x].push_back (y);
        GT[y].push_back (x);
    }
}

void DFSP (int Nod) {
    viz[Nod] = 1;
    for (unsigned int i = 0; i < G[Nod].size(); ++i) {
        int vecin = G[Nod][i];
        if (!viz[vecin]) DFSP(vecin);
    }
    S.push (Nod);
}

void DFSM (int Nod) {
    viz[Nod] = 2;
    CTC[nr].push_back (Nod);
    for (unsigned int i = 0; i < GT[Nod].size(); ++i) {
        int vecin = GT[Nod][i];
        if (viz[vecin] == 1) DFSM (vecin);
    }
}


void solve () {
    for (int i = 1; i <= n; ++i) if (!viz[i]) DFSP(i);
    while (!S.empty()) {
        int Nod = S.top();
        S.pop();
        if (viz[Nod] == 1) {
            nr ++;
            DFSM(Nod);
        }
    }
}

void print () {

}

int main() {
    read();
    solve();
    print();
    return 0;
}