Submission #2238711

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Source Code Expand

#include <cstdlib>
#include <iostream>
#include <cstdint>
#include <vector>
#include <string>
#include <complex>
#include <boost/lexical_cast.hpp>
#include <boost/algorithm/string/predicate.hpp>

using namespace std;

using namespace boost;
using namespace boost::algorithm;

int main()
{
    int N, M;
    cin >> N >> M;

    std::vector<std::vector<int>> rel;
    rel.resize(N+1);
    for (int i = 0; i < M; ++i) {
        int x, y;
        cin >> x >> y;
        rel[x].push_back(y);
    }

    size_t count = 0;
    for (auto&& n : rel) {
        for (auto&& p: n) {
            cerr << p << " ";
        }
        count = std::max(count, n.size()+1);
    }
    cout << count << endl;

    return 0;
}

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