foo.cpp: In function 'int main()':
foo.cpp:12:31: warning: unknown conversion type character 'l' in format [-Wformat=]
  scanf("%lld%lld%lld",&n,&k,&p);
                               ^
foo.cpp:12:31: warning: unknown conversion type character 'l' in format [-Wformat=]
foo.cpp:12:31: warning: unknown conversion type character 'l' in format [-Wformat=]
foo.cpp:12:31: warning: too many arguments for format [-Wformat-extra-args]
foo.cpp:20:18: error: 'a' was not declared in this scope
  printf("%lld\n",a[n]%p);
                  ^