Compilare: user.cpp: In function ‘int main()’: user.cpp:24:15: warning: unused variable ‘s’ [-Wunused-variable] int i, j, s, t, d, k, c, x1, y1, x2, y2, ma; ^ user.cpp:24:21: warning: unused variable ‘d’ [-Wunused-variable] int i, j, s, t, d, k, c, x1, y1, x2, y2, ma; ^ user.cpp:24:27: warning: unused variable ‘c’ [-Wunused-variable] int i, j, s, t, d, k, c, x1, y1, x2, y2, ma; ^ user.cpp: In function ‘int filla(int, int)’: user.cpp:71:12: warning: unused variable ‘j’ [-Wunused-variable] int i, j, s, x_aa, y_aa; ^ user.cpp: In function ‘int main()’: user.cpp:21:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("sahara.in","r",stdin); ^ user.cpp:22:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("sahara.out","w",stdout); ^ user.cpp:26:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&n,&m,&q); ^ user.cpp:27:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&t); ^ user.cpp:30:47: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d%d",&x1,&y1,&x2,&y2,&k); ^