Compilare: user.cpp: In function ‘int Pairup(int)’: user.cpp:38:12: warning: unused variable ‘i’ [-Wunused-variable] int y, i = 0; ^ user.cpp: In function ‘int main()’: user.cpp:85:34: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d", &n, &m, &k); ^ user.cpp:122:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &Bsize); ^ user.cpp:130:45: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &B[i].x, &B[i].y); ^