Compilare: user.cpp: In function ‘int deschidere(int, int)’: user.cpp:26:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=1;j<=chei.size()+1;j++){ ^ user.cpp: In function ‘int deschidere2(int, int)’: user.cpp:60:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<=chei.size()+1;i++){ ^ user.cpp: In function ‘int main()’: user.cpp:103:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(chei.size()>=k){ ^ user.cpp: In function ‘int deschidere(int, int)’: user.cpp:57:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In function ‘int deschidere2(int, int)’: user.cpp:89:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:113:12: warning: ‘sem’ may be used uninitialized in this function [-Wmaybe-uninitialized] g<<sem<<endl; ^