Compilare: main.c: In function 'main': main.c:47:2: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("rmq.in", "r", stdin); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:48:2: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("rmq.out", "w", stdout); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:52:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &m); ^~~~~~~~~~~~~~~~~~~~~ main.c:53:26: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] for(int i=1; i<=n; i++) scanf("%d", &mintable[0][i]); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:62:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &st, &dr); ^~~~~~~~~~~~~~~~~~~~~~~