Compilare: user.cpp: In function ‘void buildCTCGraph()’: user.cpp:79:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<CTC[i].size();j++) ^ user.cpp:82:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k=0;k<G[node].size();k++) ^ user.cpp: In function ‘void DFS(int)’: user.cpp:101:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<G[node].size();i++) ^ user.cpp: In function ‘void DFS2(int)’: user.cpp:118:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<G[node].size();i++) ^ user.cpp:132:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<GT[node].size();i++) ^ user.cpp: In function ‘int findSource()’: user.cpp:186:1: warning: control reaches end of non-void function [-Wreturn-type] } ^