foo.cpp:22:15: error: stray ',' at end of member declaration
  int ele[3][3],; static int Mod;
               ^
foo.cpp: In function 'int main()':
foo.cpp:63:30: warning: unknown conversion type character 'l' in format [-Wformat=]
  scanf("%lld%d%d", &n, &K, &p);
                              ^
foo.cpp:63:30: warning: format '%d' expects argument of type 'int*', but argument 2 has type 'll* {aka long long int*}' [-Wformat=]
foo.cpp:63:30: warning: too many arguments for format [-Wformat-extra-args]