Compilare: user.cpp: In function ‘int main()’: user.cpp:50:18: warning: array subscript has type ‘char’ [-Wchar-subscripts] is[ s[i] ] = 1; ^ user.cpp:51:19: warning: array subscript has type ‘char’ [-Wchar-subscripts] res[ s[i] ] = ( res[ s[i] ] + Comb(st+dr,st) ) % MOD; ^ user.cpp:51:35: warning: array subscript has type ‘char’ [-Wchar-subscripts] res[ s[i] ] = ( res[ s[i] ] + Comb(st+dr,st) ) % MOD; ^ user.cpp:42:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d\n",&N); ^ user.cpp:43:24: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(s, NMax, fin); ^