Compilare: main.cpp: In function 'bool getElem()': main.cpp:30:23: warning: array subscript has type 'char' [-Wchar-subscripts] 30 | val = ( elem[s[poz]] ^ n ); | ~~~~~^ main.cpp: In function 'bool evalSol()': main.cpp:39:12: warning: unused variable 'op' [-Wunused-variable] 39 | int val, op; | ^~ main.cpp: In function 'int main()': main.cpp:75:10: warning: array subscript has type 'char' [-Wchar-subscripts] 75 | elem[ch] = ( elem[ch] ^ 1 ); | ^~ main.cpp:75:23: warning: array subscript has type 'char' [-Wchar-subscripts] 75 | elem[ch] = ( elem[ch] ^ 1 ); | ^~