Compilare: main.cpp: In function 'int unire(int, int)': main.cpp:20:9: warning: unused variable 's2' [-Wunused-variable] 20 | int s2=sef(y); | ^~ main.cpp:22:1: warning: no return statement in function returning non-void [-Wreturn-type] 22 | } | ^ main.cpp: In function 'int main()': main.cpp:25:21: warning: unused variable 'j' [-Wunused-variable] 25 | int n , m , i , j , x , y , tip; | ^