prepare (1/3): 
finished

make (2/3): 
gcc -O2 main.c -o main
main.c: In function 'Kruskal':
main.c:31:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d%d",&e[i].x,&e[i].y,&e[i].w),e[i].f=0;
   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
main.c: In function 'Prim':
main.c:68:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d%d",&x,&y,&w);
   ^~~~~~~~~~~~~~~~~~~~~~~~
main.c: In function 'main':
main.c:95:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d",&m,&n);
  ^~~~~~~~~~~~~~~~~~~
finished

clean (3/3): 
finished

all task finished, build successfully