Compilare: user.cpp: In function ‘int main()’: user.cpp:18:18: warning: array subscript has type ‘char’ [-Wchar-subscripts] a[i][s[i]]=1; ^ user.cpp:21:20: warning: array subscript has type ‘char’ [-Wchar-subscripts] a[n+1][s[i]]++; ^ user.cpp:29:19: warning: array subscript has type ‘char’ [-Wchar-subscripts] b[i][s1[i]]=1; ^ user.cpp:32:21: warning: array subscript has type ‘char’ [-Wchar-subscripts] b[n+1][s1[i]]++; ^ user.cpp:76:40: warning: array subscript has type ‘char’ [-Wchar-subscripts] nr=nr+nrgr/2*a[ja][s[i]]; ^ user.cpp:80:40: warning: array subscript has type ‘char’ [-Wchar-subscripts] nr=nr+nrgr/2*a[ja][s[i]]; ^ user.cpp:85:41: warning: array subscript has type ‘char’ [-Wchar-subscripts] nr=nr+nrgr/2*b[jb][s1[i]]; ^ user.cpp:89:41: warning: array subscript has type ‘char’ [-Wchar-subscripts] nr=nr+nrgr/2*b[jb][s1[i]]; ^ user.cpp:94:15: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(k%4==1) ^ user.cpp:91:7: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(nrgr%2!=0) ^