Compilare: main.c: In function 'main': main.c:12:3: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d",&n,&k); ^~~~~~~~~~~~~~~~~~~~~~~~ main.c:15:5: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&a); ^~~~~~~~~~~~~~~~~~~ main.c:27:9: warning: iteration 999999 invokes undefined behavior [-Waggressive-loop-optimizations] if(v[i]>=k){ ~^~~ main.c:26:3: note: within this loop for(i=1;i<=1000000;i++){ ^~~ main.c:43:11: warning: 'x2' may be used uninitialized in this function [-Wmaybe-uninitialized] v2[x2]=1; ~~~~~~^~