Compilare: user.cpp: In function ‘int main()’: user.cpp:21:67: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(!stk.empty() && a[i]>stk.top() && n-i+1+stk.size()>=m) ^ user.cpp:15:19: warning: unused variable ‘ok’ [-Wunused-variable] int n,m,i,k=0,ok,j; ^ user.cpp:15:22: warning: unused variable ‘j’ [-Wunused-variable] int n,m,i,k=0,ok,j; ^