Compilare: user.cpp: In function ‘int main()’: user.cpp:43:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0; j<sol[i].size();j++) ^ user.cpp: In function ‘void dfs(int)’: user.cpp:68:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0; i<A[x].size(); i++) ^ user.cpp: In function ‘void dfs_transpus(int)’: user.cpp:81:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0; i<T[x].size(); i++) ^