Compilare: main.cpp: In function 'void df(int)': main.cpp:21:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<G[nod].size();i++){ ~^~~~~~~~~~~~~~ main.cpp: In function 'int distmax(int)': main.cpp:35:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<G[nod].size();i++){ ~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:60:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<ctc[i].size();j++){ ~^~~~~~~~~~~~~~ main.cpp:61:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k=0;k<ctc[i].size();k++){ ~^~~~~~~~~~~~~~ main.cpp:70:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k=0;k<ctc[i].size();k++){ ~^~~~~~~~~~~~~~ main.cpp: In function 'int distmax(int)': main.cpp:42:20: warning: 'nod' may be used uninitialized in this function [-Wmaybe-uninitialized] return dist[nod]-dist[sn]+1; ~~~~~~~~^