Compilare: main.cpp: In function 'int main()': main.cpp:6:19: warning: variable 'nm' set but not used [-Wunused-but-set-variable] int n,m,i,j,x,nm,k,i1,v,vmax=0; ^~ main.cpp:8:27: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d",&n,&m); ^ main.cpp:13:30: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&x); ^