Compilare: user.cpp: In function ‘int DFS(int, int)’: user.cpp:16:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[nod].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:57:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<f[X].size();i++) ^ user.cpp:58:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] {for(j=0;j<f[Y].size();j++) ^ user.cpp:64:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<f[X].size();i++) ^ user.cpp:65:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] {for(j=0;j<f[Z].size();j++) ^ user.cpp:71:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<f[Y].size();i++) ^ user.cpp:72:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] {for(j=0;j<f[Z].size();j++) ^ user.cpp:78:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<f[XY].size();i++) ^ user.cpp:79:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] {for(j=0;j<f[Y].size();j++) ^ user.cpp:85:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<f[XZ].size();i++) ^ user.cpp:86:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] {for(j=0;j<f[Z].size();j++) ^ user.cpp:92:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<f[YZ].size();i++) ^ user.cpp:93:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] {for(j=0;j<f[Z].size();j++) ^