Compilare: user.cpp: In function ‘int main()’: user.cpp:14:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<=l;++i) ^ user.cpp:22:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=l+1;i<=u;++i) ^ user.cpp:32:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=u+1;i<=n;++i) ^ user.cpp:44:17: warning: suggest parentheses around assignment used as truth value [-Wparentheses] if(m=u-l) ^ user.cpp:60:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(p<=mn) {mn=p; w=e;} ^ user.cpp:10:24: warning: unused variable ‘h’ [-Wunused-variable] unsigned n,p,u,l,a,h,m,e,x; ^