Compilare: main.cpp: In function 'int main()': main.cpp:17:34: warning: array subscript has type 'char' [-Wchar-subscripts] 17 | for(i = 0; i < n; i++) f1[a[i]]++; | ~~~^ main.cpp:20:34: warning: array subscript has type 'char' [-Wchar-subscripts] 20 | for(i = 0; i < t; i++) f2[b[i]]++; | ~~~^ main.cpp:28:58: warning: array subscript has type 'char' [-Wchar-subscripts] 28 | while(!st.empty() && a[i] < st.top() && f1[st.top()] > f2[st.top()]){ | ~~~~~~^~ main.cpp:28:73: warning: array subscript has type 'char' [-Wchar-subscripts] 28 | while(!st.empty() && a[i] < st.top() && f1[st.top()] > f2[st.top()]){ | ~~~~~~^~ main.cpp:29:22: warning: array subscript has type 'char' [-Wchar-subscripts] 29 | f2[st.top()]++; | ~~~~~~^~ main.cpp:32:18: warning: array subscript has type 'char' [-Wchar-subscripts] 32 | if(f2[a[i]]){ | ~~~^ main.cpp:34:19: warning: array subscript has type 'char' [-Wchar-subscripts] 34 | f2[a[i]]--; | ~~~^ main.cpp:36:15: warning: array subscript has type 'char' [-Wchar-subscripts] 36 | f1[a[i]]--; | ~~~^