Compilare: main.cpp: In function 'int main()': main.cpp:42:9: warning: unused variable 'x' [-Wunused-variable] 42 | int x, y, w, s=0; | ^ main.cpp:42:12: warning: unused variable 'y' [-Wunused-variable] 42 | int x, y, w, s=0; | ^ main.cpp:42:15: warning: unused variable 'w' [-Wunused-variable] 42 | int x, y, w, s=0; | ^ main.cpp: In function 'int find(int)': main.cpp:26:19: warning: control reaches end of non-void function [-Wreturn-type] 26 | else parent[i]=find(parent[i]); | ~~~~~~~~~^~~~~~~~~~~~~~~~