Compilare: main.cpp: In function 'int main()': main.cpp:62:36: warning: array subscript has type 'char' [-Wchar-subscripts] 62 | while(k2>0 && prior[x[i]]<=prior[s2[k2]]) | ~~~^ main.cpp:62:51: warning: array subscript has type 'char' [-Wchar-subscripts] 62 | while(k2>0 && prior[x[i]]<=prior[s2[k2]]) | ~~~~~^