Compilare: user.cpp: In function ‘void sterge(long long int)’: user.cpp:70:29: warning: operation on ‘s’ may be undefined [-Wsequence-point] dr[s]->n = dr[s--]->n->n; ^ user.cpp: At global scope: user.cpp:82:6: warning: ISO C++ forbids declaration of ‘main’ with no type [-Wreturn-type] main(){ ^ user.cpp: In function ‘int main()’: user.cpp:99:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<s1.size();j++){ ^ user.cpp:108:17: warning: unused variable ‘h’ [-Wunused-variable] int h=in; ^ user.cpp:109:23: warning: unused variable ‘l’ [-Wunused-variable] long long l=1; ^ user.cpp:125:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<s1.size();j++){ ^ user.cpp:134:17: warning: unused variable ‘h’ [-Wunused-variable] int h=in; ^ user.cpp:135:23: warning: unused variable ‘l’ [-Wunused-variable] long long l=1; ^