Compilare: user.cpp: In function ‘bool rectangle(int)’: user.cpp:43:17: warning: unused variable ‘Y2’ [-Wunused-variable] int Y2 = y - l1; ^ user.cpp:29:13: warning: unused variable ‘Y1’ [-Wunused-variable] int Y1 = y + l1; ^ user.cpp: In function ‘int main()’: user.cpp:70:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("robotics.in", "r", stdin); ^ user.cpp:71:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("robotics.out", "w", stdout); ^ user.cpp:74:32: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &N, &M, &T); ^ user.cpp:78:37: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &x, &y, &tp); ^