Compilare: main.cpp: In function 'int main()': main.cpp:25:59: warning: array subscript has type 'char' [-Wchar-subscripts] for(i = 0; i < N - 2; ++i) ++cnt[ min(s[i], s[i + 2]) ][ s[i + 1] ][ max(s[i], s[i + 2]) ]; ^ main.cpp:25:71: warning: array subscript has type 'char' [-Wchar-subscripts] for(i = 0; i < N - 2; ++i) ++cnt[ min(s[i], s[i + 2]) ][ s[i + 1] ][ max(s[i], s[i + 2]) ]; ^ main.cpp:25:94: warning: array subscript has type 'char' [-Wchar-subscripts] for(i = 0; i < N - 2; ++i) ++cnt[ min(s[i], s[i + 2]) ][ s[i + 1] ][ max(s[i], s[i + 2]) ]; ^ main.cpp:26:32: warning: array subscript has type 'char' [-Wchar-subscripts] ++cnt[ min(s[N - 2], s[0]) ][ s[N - 1] ][ max(s[0], s[N - 2]) ]; ^ main.cpp:26:44: warning: array subscript has type 'char' [-Wchar-subscripts] ++cnt[ min(s[N - 2], s[0]) ][ s[N - 1] ][ max(s[0], s[N - 2]) ]; ^ main.cpp:26:67: warning: array subscript has type 'char' [-Wchar-subscripts] ++cnt[ min(s[N - 2], s[0]) ][ s[N - 1] ][ max(s[0], s[N - 2]) ]; ^ main.cpp:27:32: warning: array subscript has type 'char' [-Wchar-subscripts] ++cnt[ min(s[N - 1], s[1]) ][ s[0] ][ max(s[N - 1], s[1]) ]; ^ main.cpp:27:40: warning: array subscript has type 'char' [-Wchar-subscripts] ++cnt[ min(s[N - 1], s[1]) ][ s[0] ][ max(s[N - 1], s[1]) ]; ^ main.cpp:27:63: warning: array subscript has type 'char' [-Wchar-subscripts] ++cnt[ min(s[N - 1], s[1]) ][ s[0] ][ max(s[N - 1], s[1]) ]; ^ main.cpp:21:25: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%s", s); ^