Compilare: user.c: In function ‘D’: user.c:5:9: warning: unused variable ‘i’ [-Wunused-variable] int i,g; ^ user.c: In function ‘main’: user.c:17:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("sudest.in","r",stdin),freopen("sudest.out","w",stdout),scanf("%d",&n); ^ user.c:17:43: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("sudest.in","r",stdin),freopen("sudest.out","w",stdout),scanf("%d",&n); ^ user.c:17:74: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] freopen("sudest.in","r",stdin),freopen("sudest.out","w",stdout),scanf("%d",&n); ^ user.c:20:14: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&a[i][j]),c[i][j]=-1,p[i][j]=255; ^ user.c:21:10: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&k); ^ user.c:23:14: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&m[d]); ^