Compilare: user.c: In function ‘main’: user.c:64:5: warning: implicit declaration of function ‘qsort’ [-Wimplicit-function-declaration] qsort(X,m,sizeof(int),cmx); ^ user.c:56:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("vopsire.in","r",stdin); ^ user.c:57:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("vopsire.out","w",stdout); ^ user.c:59:10: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%i%i",&n,&m); ^ user.c:61:28: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] fr(i,0,n)fr(j,0,4)scanf("%i",a[i]+j); ^ user.c:62:19: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] fr(i,0,m)scanf("%i%i",x+i,y+i); ^