Compilare: user.cpp: In function ‘int vfind(std::vector<int>, int)’: user.cpp:33:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < v.size(); ++i) ^ user.cpp: In function ‘double solve(int, int)’: user.cpp:80:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j = 0; j < O[1][g].size(); ++j) ^ user.cpp: In function ‘int main()’: user.cpp:116:18: warning: unused variable ‘_v’ [-Wunused-variable] int T, n, g, _v, _g, _p; ^ user.cpp:116:22: warning: unused variable ‘_g’ [-Wunused-variable] int T, n, g, _v, _g, _p; ^ user.cpp:116:26: warning: unused variable ‘_p’ [-Wunused-variable] int T, n, g, _v, _g, _p; ^