Compilare: main.cpp: In function 'void build(int, char, int)': main.cpp:16:30: warning: array subscript has type 'char' [-Wchar-subscripts] fprintf (fout, "%d", nr[k]); ^ main.cpp:17:23: warning: array subscript has type 'char' [-Wchar-subscripts] r = (r - pc[pas][k] + n) % n; ^ main.cpp: In function 'int main()': main.cpp:51:27: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin, "%d", &t); ^ main.cpp: In function 'void solve()': main.cpp:23:33: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin, "%d%d", &p, &n); ^