Compilare: main.cpp: In function 'int main()': main.cpp:33:16: warning: unused variable 'x1' [-Wunused-variable] long long x1,x2,y1,y2; ^~ main.cpp:33:19: warning: unused variable 'x2' [-Wunused-variable] long long x1,x2,y1,y2; ^~ main.cpp:33:22: warning: unused variable 'y1' [-Wunused-variable] long long x1,x2,y1,y2; ^~ main.cpp:33:25: warning: unused variable 'y2' [-Wunused-variable] long long x1,x2,y1,y2; ^~