Compilare: user.cpp: In function ‘int main()’: user.cpp:19:18: warning: unused variable ‘j’ [-Wunused-variable] int n, m, i, j, s, t, d, k, p, q; ^ user.cpp:19:21: warning: unused variable ‘s’ [-Wunused-variable] int n, m, i, j, s, t, d, k, p, q; ^ user.cpp:19:24: warning: unused variable ‘t’ [-Wunused-variable] int n, m, i, j, s, t, d, k, p, q; ^ user.cpp:19:30: warning: unused variable ‘k’ [-Wunused-variable] int n, m, i, j, s, t, d, k, p, q; ^ user.cpp:16:32: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("rmq.in","r",stdin); ^ user.cpp:17:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("rmq.out","w",stdout); ^ user.cpp:21:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ user.cpp:23:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&rmq[0][i]); ^ user.cpp:30:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&p,&q); ^