Compilare: user.cpp: In function ‘void Euler(int)’: user.cpp:35:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<a[k].size(); i++) ^ user.cpp:32:9: warning: unused variable ‘i’ [-Wunused-variable] int i; ^ user.cpp: In function ‘int Pozitiaeu()’: user.cpp:51:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:64:13: warning: unused variable ‘d’ [-Wunused-variable] int i,x,d,sol,y; ^ user.cpp:64:15: warning: unused variable ‘sol’ [-Wunused-variable] int i,x,d,sol,y; ^