Compilare: main.cpp: In function 'int main()': main.cpp:67:46: warning: suggest parentheses around '&&' within '||' [-Wparentheses] if ((x_1 < x_2 && y_1 > y_2) || x_2 < x_1 && y_2 > y_1) { ~~~~~~~~~~^~~~~~~~~~~~ main.cpp:80:46: warning: self-comparison always evaluates to false [-Wtautological-compare] else if ((x_1 < x_2 && y_1 < y_2) || (x_2 < x_2 && y_2 < y_1)) { ~~~~^~~~~