Compilare: user.cpp: In function ‘int main()’: user.cpp:23:22: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&n); ^ user.cpp:25:48: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&v[i]),s=(s+v[i]%MOD)%MOD; ^ user.cpp:33:9: warning: ‘p’ may be used uninitialized in this function [-Wmaybe-uninitialized] s+=p; ^