Compilare: user.cpp: In function ‘void Solve()’: user.cpp:60:74: warning: operation on ‘top[i]’ may be undefined [-Wsequence-point] else st[i][++top[i]] = poz[i][x-'a'][st[i][top[i]-1]]; ^ user.cpp:35:11: warning: unused variable ‘j’ [-Wunused-variable] int i,j,k,ans,lst; ^ user.cpp:35:13: warning: unused variable ‘k’ [-Wunused-variable] int i,j,k,ans,lst; ^ user.cpp:35:19: warning: unused variable ‘lst’ [-Wunused-variable] int i,j,k,ans,lst; ^