/in/foo.cc: In function 'int main()':
/in/foo.cc:9:17: warning: format '%d' expects argument of type 'int*', but argument 2 has type 'long long int*' [-Wformat=]
 scanf("%I64d",&n);
                 ^
/in/foo.cc:10:37: warning: format '%d' expects argument of type 'int*', but argument 2 has type 'long long int*' [-Wformat=]
 for(i=1;i<=n;i++)scanf("%I64d",&a[i]);
                                     ^