Compilare: main.cpp: In function 'int32_t main()': main.cpp:76:53: warning: array subscript has type 'char' [-Wchar-subscripts] 76 | while(!st_op.empty() && prioritate[st_op.top()] >= prioritate[s[i]]){ | ~~~~~~~~~^~ main.cpp:76:75: warning: array subscript has type 'char' [-Wchar-subscripts] 76 | while(!st_op.empty() && prioritate[st_op.top()] >= prioritate[s[i]]){ | ^ main.cpp:17:24: warning: unused variable 'ans' [-Wunused-variable] 17 | int i, nr, j,a, b, ans=0, n; | ^~~