Compilare: main.cpp: In function 'int solve(int, int)': main.cpp:42:1: warning: no return statement in function returning non-void [-Wreturn-type] 42 | } | ^ main.cpp: In function 'int minimum_spanning_tree()': main.cpp:46:11: warning: unused variable 'j' [-Wunused-variable] 46 | int i,j; | ^ main.cpp: In function 'int main()': main.cpp:64:13: warning: unused variable 'j' [-Wunused-variable] 64 | int q,i,j,s=0; | ^ main.cpp:64:15: warning: unused variable 's' [-Wunused-variable] 64 | int q,i,j,s=0; | ^