Compilare: main.cpp: In constructor 'LPSolver::LPSolver(const std::vector<std::vector<double> >&, const std::vector<double>&, const std::vector<double>&)': main.cpp:16:11: warning: 'LPSolver::N' will be initialized after [-Wreorder] VI B, N; ^ main.cpp:16:8: warning: 'std::vector<int> LPSolver::B' [-Wreorder] VI B, N; ^ main.cpp:20:5: warning: when initialized here [-Wreorder] LPSolver(const VVD &A, const VD &b, const VD &c): ^~~~~~~~ main.cpp: In member function 'bool LPSolver::Simplex(int)': main.cpp:69:72: warning: suggest parentheses around '&&' within '||' [-Wparentheses] if (s == -1 || D[x][j] < D[x][s] || D[x][j] == D[x][s] && N[j] < N[s]) main.cpp:80:76: warning: suggest parentheses around '&&' within '||' [-Wparentheses] (D[i][n + 1] / D[i][s]) == (D[r][n + 1] / D[r][s]) && B[i] < B[r]) main.cpp: In member function 'double LPSolver::Solve(std::vector<double>&)': main.cpp:105:80: warning: suggest parentheses around '&&' within '||' [-Wparentheses] if (s == -1 || D[i][j] < D[i][s] || D[i][j] == D[i][s] && N[j] < N[s]) main.cpp: In lambda function: main.cpp:210:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < A.size(); ++i) ~~^~~~~~~~~~ main.cpp:189:13: warning: unused variable 'i' [-Wunused-variable] int i = 0; ^ main.cpp: In function 'int main()': main.cpp:229:15: warning: unused variable 'ans' [-Wunused-variable] long long ans = -1; ^~~