Compilare: user.cpp: In function ‘void multiply(int)’: user.cpp:21:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (i < aux.size() || t) { ^ user.cpp:22:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (i < aux.size()) t = t + (aux[i] * k); ^ user.cpp:30:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < result.size(); i++) ^ user.cpp: In function ‘void add(std::vector<int>&, std::vector<int>&)’: user.cpp:42:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (i < sol.size() || i < aux.size() || t) { ^ user.cpp:42:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (i < sol.size() || i < aux.size() || t) { ^ user.cpp:44:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (i < sol.size()) t += sol[i]; ^ user.cpp:45:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (i < aux.size()) t += aux[i]; ^ user.cpp:54:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < result.size(); i++) ^ user.cpp: In function ‘void diff(std::vector<int>&, std::vector<int>&)’: user.cpp:68:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (i < sol.size() || i < aux.size() || t) { ^ user.cpp:68:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (i < sol.size() || i < aux.size() || t) { ^ user.cpp:71:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (i < sol.size()) t = sol[i]; ^ user.cpp:72:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (i < aux.size()) t -= aux[i]; ^ user.cpp:88:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < result.size(); i++) ^ user.cpp: In function ‘void print(std::vector<int>)’: user.cpp:96:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < V.size(); i++) ^ user.cpp: In function ‘int main()’: user.cpp:163:48: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < nr[j].size(); i++) ^