Compilare: user.cpp: In function ‘bool nuunic(int, int, int)’: user.cpp:31:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( int i=0;i<graf[x].size();++i ) ^ user.cpp: In function ‘void calcul(int)’: user.cpp:39:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( int i=0;i<graf[x].size();++i ){ ^ user.cpp: In function ‘int main()’: user.cpp:50:22: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&t); ^ user.cpp:53:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d",&n,&k); ^ user.cpp:55:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&v[i]); ^