Compilare: user.cpp: In function ‘int main()’: user.cpp:45:33: warning: array subscript has type ‘char’ [-Wchar-subscripts] for(cnt=x;y;y-=(pw[lg[y]])) cnt=dp[lg[y]][cnt]; ^ user.cpp:45:49: warning: array subscript has type ‘char’ [-Wchar-subscripts] for(cnt=x;y;y-=(pw[lg[y]])) cnt=dp[lg[y]][cnt]; ^ user.cpp:13:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("citylog.in","r",stdin); ^ user.cpp:14:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("citylog.out","w",stdout); ^ user.cpp:17:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ user.cpp:25:36: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&type,&x,&y); ^