Compilare: main.cpp: In function 'int main()': main.cpp:16:12: warning: array subscript has type 'char' [-Wchar-subscripts] v[c]++; ^ main.cpp:20:16: warning: array subscript has type 'char' [-Wchar-subscripts] if (v[i]>1) {g << 1; return 0;} ^ main.cpp:9:9: warning: unused variable 'n' [-Wunused-variable] int n; ^ main.cpp:20:16: warning: array subscript is above array bounds [-Warray-bounds] if (v[i]>1) {g << 1; return 0;} ~~~^