Compilare: user.cpp: In function ‘int main()’: user.cpp:30:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<v[i].size();j++) ^ user.cpp:36:40: warning: suggest parentheses around ‘-’ inside ‘<<’ [-Wparentheses] confn = (1<<v[i][j]-1) |k; ^ user.cpp: In function ‘void citire()’: user.cpp:15:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d%d",&n,&m,&e); ^ user.cpp:18:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d",&a,&b); ^