Compilare: user.cpp: In function ‘int main()’: user.cpp:44:46: warning: array subscript has type ‘char’ [-Wchar-subscripts] d[i+(1<<poz)][(j+p[bit[i]]*v[poz+1])%r]+=d[i][j]; ^ user.cpp:49:42: warning: array subscript has type ‘char’ [-Wchar-subscripts] d[i+(1<<poz)][(j+p[bit[i]]*v[poz+1])%r]+=d[i][j]; ^ user.cpp:19:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ratphu.in","r",stdin); ^ user.cpp:20:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ratphu.out","w",stdout); ^ user.cpp:21:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld%d",&val,&r); ^