Compilare: main.c: In function 'main': main.c:29:5: 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); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:29:37: 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); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:29:71: 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); ^~~~~~~~~~~~~~~~~~~~~~~~ main.c:31:9: 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; ^~~~~~~~~~~~~~~~~~~ main.c:33:9: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&i),D(i); ^~~~~~~~~~~~~~