func_code_string: #include <bits/stdc++.h>   using namespace std;   int D, m, x, y;   vector<vector<long double>> e;   const long double oo = 1e13;   vector<long double> mns(vector<long double> a, vector<long double> b) {     vector<long double> ret;     ret.resize(D);     for (int i = 0; i < D; i++) ret[i] = a[i] - b[i];     return ret;   }   vector<long double> tms(vector<long double> a, long double c) {     for (int i = 0; i < D; i++) a[i] *= c;     return a;   }   vector<long double> perp(vector<long double> a, vector<long double> b) {     long double norma = 0, normb = 0, dot = 0;     for (int i = 0; i < D; i++) {       norma += a[i] * a[i];       normb += b[i] * b[i];       dot += a[i] * b[i];     }     if (normb < 1e-9) return a;     long double tmp = dot / normb;     vector<long double> bb = tms(b, tmp);     return mns(a, bb);   }   struct subspace {     vector<vector<long double>> vectors;     vector<vector<long long>> canon;     subspace(vector<vector<long double>> _vectors) {       int d = _vectors.size();       vectors = _vectors;       for (int i = 0; i < d; i++)         for (int j = 0; j < i; j++) vectors[i] = perp(vectors[i], vectors[j]);       for (int i = 0; i < D; i++) {         vector<long double> x = e[i];         for (int j = 0; j < d; j++) x = perp(x, vectors[j]);         vector<long long> y(D);         for (int i = 0; i < D; i++) {           y[i] = llround(x[i] * oo);         }         canon.push_back(y);       }     }   };   map<vector<vector<long long>>, int> mp;   int cnt = 1;   int main() {     std::ios::sync_with_stdio(false);     cin >> m >> D;     e.resize(D);     for (int i = 0; i < D; i++) {       e[i].resize(D);       e[i][i] = 1;     }     for (int i = 1; i <= m; i++) {       vector<vector<long double>> tmp;       cin >> x;       for (int j = 0; j < x; j++) {         vector<long double> v;         for (int k = 0; k < D; k++) {           cin >> y;           v.push_back(y);         }         tmp.push_back(v);       }       auto c = subspace(tmp).canon;       if (mp.count(c))         cout << mp[c] <<    ;       else         cout << (mp[c] = cnt++) <<    ;     }     cout << endl;   }   