Compilare: user.cpp: In function ‘int main()’: user.cpp:27:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<s.size();i++){ ^ user.cpp:28:15: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(i%2==0) ^ user.cpp:33:15: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(i%2!=0) ^ user.cpp:47:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=1;i<s.size()-1;i++){ ^ user.cpp:50:40: warning: array subscript has type ‘char’ [-Wchar-subscripts] sum=sum+max(max(ct[s[i]],ct[s[i-1]]),ct[s[i+1]]); ^ user.cpp:50:51: warning: array subscript has type ‘char’ [-Wchar-subscripts] sum=sum+max(max(ct[s[i]],ct[s[i-1]]),ct[s[i+1]]); ^ user.cpp:50:63: warning: array subscript has type ‘char’ [-Wchar-subscripts] sum=sum+max(max(ct[s[i]],ct[s[i-1]]),ct[s[i+1]]); ^ user.cpp:14:34: warning: unused variable ‘j’ [-Wunused-variable] int p,i,l=0,lmax=0,sum=0,x=1,j; ^ user.cpp:15:10: warning: variable ‘k’ set but not used [-Wunused-but-set-variable] char k; ^