cf_allocator.cpp

# codeforces allocator

const int max_memory = 13e7;

int pos_memory = 0;
char memory[max_memory];

void* operator new(size_t n) {
    char *res = memory + pos_memory;
    pos_memory += n;
    assert(pos_memory <= max_memory);
    return (void*) res;
}

void operator delete(void *){}