Compilare: main.cpp: In function 'int Union(int, int)': main.cpp:31:1: warning: no return statement in function returning non-void [-Wreturn-type] 31 | } | ^ main.cpp: In function 'int main()': main.cpp:35:18: warning: unused variable 'j' [-Wunused-variable] 35 | int n, m, i, j, op, x, y; | ^ main.cpp:40:19: warning: iteration 100004 invokes undefined behavior [-Waggressive-loop-optimizations] 40 | father[i] = i; | ~~~~~~~~~~^~~ main.cpp:38:19: note: within this loop 38 | for (i = 1; i <= NMAX; ++i) | ^