Compilare: main.cpp: In function 'bool check(char)': main.cpp:12:23: warning: array subscript has type 'char' [-Wchar-subscripts] return (freqT[sol[vf]] + 1 <= freqS[sol[vf]]); ^ main.cpp:12:45: warning: array subscript has type 'char' [-Wchar-subscripts] return (freqT[sol[vf]] + 1 <= freqS[sol[vf]]); ^ main.cpp: In function 'int main()': main.cpp:20:13: warning: array subscript has type 'char' [-Wchar-subscripts] freqS[s[i]]++; ^ main.cpp:22:13: warning: array subscript has type 'char' [-Wchar-subscripts] freqT[t[i]]++; ^ main.cpp:29:14: warning: array subscript has type 'char' [-Wchar-subscripts] freqT[s[i]]--; ^ main.cpp:30:14: warning: array subscript has type 'char' [-Wchar-subscripts] freqS[s[i]]--; ^ main.cpp:34:17: warning: array subscript has type 'char' [-Wchar-subscripts] freqT[sol[vf]]++; ^ main.cpp:37:28: warning: array subscript has type 'char' [-Wchar-subscripts] if (vf < tz && freqT[s[i]] > 0) { ^ main.cpp:39:14: warning: array subscript has type 'char' [-Wchar-subscripts] freqT[s[i]]--; ^ main.cpp:41:13: warning: array subscript has type 'char' [-Wchar-subscripts] freqS[s[i]]--; ^