为了卡常

# 不顾一切地卡常 ```cpp __inline__ __attribute__ ((always_inline)) int mul_mod(int a, int b){ int ret; __asm__ __volatile__ ("\tmull %%ebx\n\tdivl %%ecx\n":"=d"(ret):"a"(a),"b"(b),"c"(MODS)); return ret; } ```