Compilare: user.cpp: In function ‘int main()’: user.cpp:68:26: warning: unused variable ‘k’ [-Wunused-variable] int nrSp = 0, j = n, k = 1; ^ user.cpp:56:36: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d", &n, &xc, &yc); ^ user.cpp:61:33: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &xi, &yi); ^