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:60:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<f[X].size();i++) ^ user.cpp:61:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] {for(j=0;j<f[Y].size();j++) ^ user.cpp:67:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<f[X].size();i++) ^ user.cpp:68:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] {for(j=0;j<f[Z].size();j++) ^ user.cpp:74:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<f[Y].size();i++) ^ user.cpp:75:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] {for(j=0;j<f[Z].size();j++) ^ user.cpp:81:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<f[XY].size();i++) ^ user.cpp:82:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] {for(j=0;j<f[Y].size();j++) ^ user.cpp:88:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<f[XZ].size();i++) ^ user.cpp:89:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] {for(j=0;j<f[Z].size();j++) ^ user.cpp:95:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<f[YZ].size();i++) ^ user.cpp:96:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] {for(j=0;j<f[Z].size();j++) ^