Compilare: user.c: In function ‘main’: user.c:17:13: warning: format ‘%lld’ expects argument of type ‘long long int’, but argument 2 has type ‘int’ [-Wformat=] printf("%lld ",c[i][j]); ^ user.c:4:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("rf.in","r",stdin),freopen("rf.out","w",stdout),scanf("%d",&n); ^ user.c:4:39: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("rf.in","r",stdin),freopen("rf.out","w",stdout),scanf("%d",&n); ^ user.c:4:66: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] freopen("rf.in","r",stdin),freopen("rf.out","w",stdout),scanf("%d",&n); ^ user.c:7:14: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&a[i][j]),c[i][j]=a[i][j],p[i][j]=i==j?0:1; ^