#include <cstdio>
  #include <cstdlib>
  int main() {
      const size_t size = 990ULL * 1024 * 1024;
      volatile char *p = (volatile char*)malloc(size);
      if (!p) { puts("malloc failed"); return 0; }
      for (size_t i = 0; i < size; i += 4096) p[i] = 1;
      puts("Hello World!");
  }