Compilare: user.cpp: In function ‘int main()’: user.cpp:14:17: warning: variable ‘e3y’ set but not used [-Wunused-but-set-variable] int e1y,e2y,e3y,e4y; ^ user.cpp:70:44: warning: ‘e2y’ may be used uninitialized in this function [-Wmaybe-uninitialized] long long fr=1LL*(e4x-e3x)*(e2y-e4y); ^ user.cpp:58:49: warning: ‘e1y’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(x[j]>e1x && x[j]<e2x && y[j]>e2y && y[j]<e1y) ^ user.cpp:70:34: warning: ‘e3x’ may be used uninitialized in this function [-Wmaybe-uninitialized] long long fr=1LL*(e4x-e3x)*(e2y-e4y); ^ user.cpp:58:25: warning: ‘e2x’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(x[j]>e1x && x[j]<e2x && y[j]>e2y && y[j]<e1y) ^