Compilare: user.c: In function ‘main’: user.c:22:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("examene.in","r",stdin),freopen("examene.out","w",stdout),scanf("%d%d%d",&n,&m,&p); ^ user.c:22:44: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("examene.in","r",stdin),freopen("examene.out","w",stdout),scanf("%d%d%d",&n,&m,&p); ^ user.c:22:76: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] freopen("examene.in","r",stdin),freopen("examene.out","w",stdout),scanf("%d%d%d",&n,&m,&p); ^ user.c:24:14: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&i,&j),g[j][w[j]++]=i,h[i][v[i]++]=j,q[i][j]=1; ^ user.c:26:14: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&i),D(i); ^