Compilare: main.cpp: In function 'int kruskal(int, int, int)': main.cpp:52:23: warning: suggest parentheses around '&&' within '||' [-Wparentheses] if (from == x && to == y || from == y && to == x) { ~~~~~~~~~~^~~~~~~~~~ main.cpp:67:29: warning: suggest parentheses around '&&' within '||' [-Wparentheses] if (to == x && it.first == y || to == y && it.first == x) ~~~~~~~~^~~~~~~~~~~~~~~~ main.cpp:66:16: warning: suggest explicit braces to avoid ambiguous 'else' [-Wparentheses] if (used[it.first] == 0) ^ main.cpp:72:1: warning: control reaches end of non-void function [-Wreturn-type] } ^