Compilare: main.c: In function 'main': main.c:27:5: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("resturi.in","r",stdin),freopen("resturi.out","w",stdout),scanf("%d",&t); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:27:37: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("resturi.in","r",stdin),freopen("resturi.out","w",stdout),scanf("%d",&t); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:27:71: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] freopen("resturi.in","r",stdin),freopen("resturi.out","w",stdout),scanf("%d",&t); ^~~~~~~~~~~~~~ main.c:29:9: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^~~~~~~~~~~~~~ main.c:33:13: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",p+i,r+i),P(z,p[i]); ^~~~~~~~~~~~~~~~~~~~~