#include "asm_regnames.h"

        .text
        .globl entry
entry:
        addiu   sp, sp, -4
        sw      ra, 0(sp)

        jal     readdec
        move    a0,v0
        jal     f
        move    a0,v0
        jal     writedec

ende:
        lw      ra,0(sp)
        addi    sp,sp,4
        jr      ra


f:      addi    sp,sp,-4
        sw      ra, 0(sp)
        move    s0,a0
        addi    sp,sp,-4
        sw      s0,0(sp)
        move    s4,s0
        addi    s4,s4,-2
        bgez    s4,notif
        li      v0,1
        lw      s0,0(sp)
        addi    sp,sp,4
        lw      ra,0(sp)
        addi    sp,sp,4
        jr      ra

notif:  jal     f
        addi    s1,s1,-1
        move    s1,v0
        mul     s2,s0,s1
        move    v0,s2
        lw      s0,0(sp)
        addi    sp,sp,4
        lw      ra,0(sp)
        addi    sp,sp,4
        jr      ra