Compilare: user.cpp: In function ‘void Precalc()’: user.cpp:26:40: warning: array subscript has type ‘char’ [-Wchar-subscripts] for(i = 1; i <= N; ++i) ++ap[ s[i] ]; ^ user.cpp: In function ‘int main()’: user.cpp:78:23: warning: array subscript has type ‘char’ [-Wchar-subscripts] res = f[ tab[c] ][r]; ^ user.cpp:78:25: warning: array subscript has type ‘char’ [-Wchar-subscripts] res = f[ tab[c] ][r]; ^ user.cpp:79:25: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(l) c = opus[c]; ^ user.cpp:80:32: warning: array subscript has type ‘char’ [-Wchar-subscripts] res = res + C[0] * ap[c] + C[1] * ap[ opus[c] ]; ^ user.cpp:80:53: warning: array subscript has type ‘char’ [-Wchar-subscripts] res = res + C[0] * ap[c] + C[1] * ap[ opus[c] ]; ^ user.cpp:80:55: warning: array subscript has type ‘char’ [-Wchar-subscripts] res = res + C[0] * ap[c] + C[1] * ap[ opus[c] ]; ^ user.cpp:62:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d %d\n",&N,&Q); ^ user.cpp:63:22: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(s,NMax,fin); ^ user.cpp:71:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%lld",&P); ^