Compilare: user.cpp: In function ‘long long int getrez(long long int, long long int, bool, char)’: user.cpp:40:20: warning: array subscript has type ‘char’ [-Wchar-subscripts] return fr[c]; ^ user.cpp:50:31: warning: array subscript has type ‘char’ [-Wchar-subscripts] rez += frAfter1Stage[c] << (stage - 2); ^ user.cpp: In function ‘int main()’: user.cpp:61:27: warning: array subscript has type ‘char’ [-Wchar-subscripts] frAfter1Stage[C[i]]++; ^ user.cpp:68:16: warning: array subscript has type ‘char’ [-Wchar-subscripts] fr[C[i]]++; ^ user.cpp:56:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d\n",&N,&Q); ^ user.cpp:57:26: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(C + 1,100005,f); ^ user.cpp:75:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%lld",&pos); ^ In file included from /usr/include/stdio.h:934:0, from /usr/include/c++/4.8/cstdio:42, from user.cpp:1: In function ‘char* fgets(char*, int, FILE*)’, inlined from ‘int main()’ at user.cpp:57:26: /usr/include/i386-linux-gnu/bits/stdio2.h:253:58: warning: call to ‘__fgets_chk_warn’ declared with attribute warning: fgets called with bigger size than length of destination buffer [enabled by default] return __fgets_chk_warn (__s, __bos (__s), __n, __stream); ^