 N: LOAD 2
    SUB  
    DUP  
    LOAD 1
    LOAD 1
N1: JLEZ N2
    ROLL 1
    LOAD 1
    LOAD 0
    DUP  
    ROLL 1
    SUB  
    SUB  
    ADD  
    ROLL 2
    DUP  
    DUP  
    ADD  
    ROLL 1
    JMP  N1
N2: POP  
    POP  
    RET  
