Compilare: user.cpp: In function ‘bool isCyclesTree()’: user.cpp:140: warning: suggest parentheses around ‘&&’ within ‘||’ user.cpp:158: warning: suggest parentheses around ‘&&’ within ‘||’ user.cpp:103: warning: unused variable ‘vx’ user.cpp:103: warning: unused variable ‘vy’ user.cpp:107: warning: unused variable ‘ct’ user.cpp:61: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:70: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘int main()’: user.cpp:319: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:320: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:323: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result