Compilare: main.c: In function 'A': main.c:5:35: warning: operation on 'h[t]' may be undefined [-Wsequence-point] for(;t>1&&v[h[t]]<v[h[t>>1]];h[t]^=h[t>>1]^=h[t]^=h[t>>1],p[h[t]]=t,p[h[t>>1]]=t>>1,t>>=1); ^~ main.c: In function 'main': main.c:21:82: warning: operation on 'h[x]' may be undefined [-Wsequence-point] for(v[r]=-1,A(p[r]),p[h[1]]=y=0,h[1]=h[j--],p[h[1]]=x=1;x!=y;h[x]^=h[y]^=h[x]^=h[y],p[h[x]]=x,p[h[y]]=y) ^~ main.c:9:2: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("heapuri.in","r",stdin),freopen("heapuri.out","w",stdout),scanf("%d",&n); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:9:34: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("heapuri.in","r",stdin),freopen("heapuri.out","w",stdout),scanf("%d",&n); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:9:68: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] freopen("heapuri.in","r",stdin),freopen("heapuri.out","w",stdout),scanf("%d",&n); ^~~~~~~~~~~~~~ main.c:12:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&z); ^~~~~~~~~~~~~~ main.c:17:6: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&r); ^~~~~~~~~~~~~~