Compilare: user.c:1:0: warning: ignoring #pragma option [-Wunknown-pragmas] #pragma option -3 -r -Z -O2 -a ^ user.c: In function ‘main’: user.c:69:9: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("banana.in", "r", stdin); ^ user.c:70:9: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("banana.out", "w", stdout); ^ user.c:71:7: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &k); ^ user.c:73:8: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", xy[i], xy[i] + 1); ^