Compilare: user.cpp: In function ‘void DFS(int, int)’: user.cpp:33:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<G[node].size();i++) ^ user.cpp: In function ‘int F(int)’: user.cpp:54:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < Comp[ind].size(); i++){ ^ user.cpp:66:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < Comp[ind].size() && ok; i++) ^ user.cpp: In function ‘int main()’: user.cpp:121:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < Comp.size(); i++){ ^ user.cpp:79:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d", &t); ^ user.cpp:82:34: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d%d", &n, &m); ^ user.cpp:85:38: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d%d", &x, &y); ^