Compilare: user.cpp: In function ‘int main()’: user.cpp:42:14: warning: array subscript has type ‘char’ [-Wchar-subscripts] fr[sir[i]][i]++; ^ user.cpp:59:20: warning: array subscript has type ‘char’ [-Wchar-subscripts] rez = fr[sir[p]][p]; ^ user.cpp:65:26: warning: array subscript has type ‘char’ [-Wchar-subscripts] rez += x / 2 * (fr[ch][k - 1] + fr[flipch(ch)][k - 1]); ^ user.cpp:65:50: warning: array subscript has type ‘char’ [-Wchar-subscripts] rez += x / 2 * (fr[ch][k - 1] + fr[flipch(ch)][k - 1]); ^ user.cpp:67:19: warning: array subscript has type ‘char’ [-Wchar-subscripts] rez += fr[ch][k - 1]; ^ user.cpp:36:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d", &k, &q); ^ user.cpp:54:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%lld", &n); ^