Compilare: user.cpp: In function ‘bool query(int, int, int, int, int, Line)’: user.cpp:119:18: warning: unused variable ‘q2’ [-Wunused-variable] bool q1 = 0, q2 = 0; ^ user.cpp: In function ‘int main()’: user.cpp:141:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &k, &m); ^ user.cpp:143:40: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &v[i].x, &v[i].y); ^ user.cpp:150:50: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d", &a.x, &a.y, &b.x, &b.y); ^