Method Mat

Math/Freivalds Algorithm.cpp:9–9

  int n, m;
  vector< vector<int> > a;
  Mat() { }
  Mat(int _n, int _m) {n = _n; m = _m; a.assign(n, vector<int>(m, 0)); }
  Mat(vector< vector<int> > v) { n = v.size(); m = n ? v[0].size() : 0; a = v; }
  inline void make_unit() {