Compilare: user.cpp: In function ‘bool solve(int, int)’: user.cpp:36:155: warning: ‘t’ may be used uninitialized in this function [-Wmaybe-uninitialized] if ( min(x1[i], x2[i])<=z && z<=max(x1[i], x2[i]) && min(y1[i], y2[i])<=t && t<=max(y1[i], y2[i]) && min(x1[j], x2[j])<=z && z<=max(x1[j], x2[j]) && min(y1[j], y2[j])<=t && t<=max(y1[j], y2[j]) ) { ^ user.cpp:36:131: warning: ‘z’ may be used uninitialized in this function [-Wmaybe-uninitialized] if ( min(x1[i], x2[i])<=z && z<=max(x1[i], x2[i]) && min(y1[i], y2[i])<=t && t<=max(y1[i], y2[i]) && min(x1[j], x2[j])<=z && z<=max(x1[j], x2[j]) && min(y1[j], y2[j])<=t && t<=max(y1[j], y2[j]) ) { ^