Compilare: main.c: In function 'main': main.c:51:5: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("nk.in", "r", stdin); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:53:5: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("nk.out", "w", stdout); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:59:5: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] scanf("%i", &t); ^~~~~~~~~~~~~~~ main.c:67:9: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] scanf("%i%i", &n, &k); ^~~~~~~~~~~~~~~~~~~~~ main.c:73:33: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] for (i = 0; i < n; ++i) scanf("%i", &A[i]); ^~~~~~~~~~~~~~~~~~