/in/foo.cc: In function 'int main()':
/in/foo.cc:28:41: warning: format '%d' expects argument of type 'int*', but argument 2 has type 'long long int*' [-Wformat=]
  for(int i = 1;i<=n;i++)scanf("%d",&a[i]);
                                         ^
/in/foo.cc:43:35: warning: suggest parentheses around '-' inside '<<' [-Wparentheses]
    f[i][j]=max(f[i][j-1],f[i+(1<<j-1)][j-1]);
                                  ~^~
/in/foo.cc:44:38: warning: suggest parentheses around '-' inside '<<' [-Wparentheses]
    f2[i][j]=min(f2[i][j-1],f2[i+(1<<j-1)][j-1]);
                                     ~^~