Compilare: user.c: In function ‘div’: user.c:56:11: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(lg<=4*n) ^ user.c:89:11: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(lg<=4*n) ^ user.c:106:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.c: In function ‘main’: user.c:111:5: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("caps.in","r",stdin); ^ user.c:112:5: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("caps.out","w",stdout); ^ user.c:113:5: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d\n",&n,&q); ^ user.c:126:9: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld",&k); ^