Compilare: user.cpp: In function ‘int main()’: user.cpp:29:22: warning: array subscript has type ‘char’ [-Wchar-subscripts] nextt[n][s[n]]=n; ^ user.cpp:33:26: warning: array subscript has type ‘char’ [-Wchar-subscripts] nextt[i][s[i]]=i; ^ user.cpp:43:51: warning: array subscript has type ‘char’ [-Wchar-subscripts] sp=sp+subsir[i]-subsir[nextt[i+1][s[i]]]; ^ user.cpp:25:13: warning: unused variable ‘cop’ [-Wunused-variable] int cop=k; ^ user.cpp:26:28: warning: unused variable ‘sum’ [-Wunused-variable] unsigned long long sum=0; ^