Compilare: user.cpp: In function ‘void DFS1(int)’: user.cpp:85:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<G[x].size(); i++) ^ user.cpp: In function ‘void DFS2(int)’: user.cpp:102:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<G[x].size(); i++) ^ user.cpp: In function ‘void BFS(int, int, muchie&)’: user.cpp:128:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<G[nod].size(); i++) ^ user.cpp: In function ‘int main()’: user.cpp:29:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&T); ^ user.cpp:33:55: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d %d %d %d",&N,&c[1],&c[2],&c[3]); ^ user.cpp:37:38: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d %d",&a,&b); ^