Compilare: user.cpp: In function ‘int calc(int, int, std::vector<std::vector<int> >&, const std::vector<std::vector<int> >&, const std::vector<int>&, const std::vector<int>&)’: user.cpp:23:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(poz[mat[i][j]] == vec.size()-1) ^ user.cpp: In lambda function: user.cpp:25:78: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] auto ina = [dp] (int lhs, int rhs) { return lhs>=0 && rhs>=0 && lhs<dp.size() && rhs<dp[0].size();}; ^ user.cpp:25:98: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] auto ina = [dp] (int lhs, int rhs) { return lhs>=0 && rhs>=0 && lhs<dp.size() && rhs<dp[0].size();}; ^