10    INPUT X0,L,M
20    N=0
30    X1= SQR(1+SIN(X0))/4
40    N1=(LOG(1-L)*10**(-M)/ABS(X0-X1))/LOG(L)
50    N1=INT(N1+1)
60    N=N+1
70    X0=X1
80    X1=SQR(1+SIN(X0))/4
90    IF N=N1 THEN 130
100   F =L*ABS(X1-X0)/(1-L)
110   IF F<10**(-M) THEN 130
120   GOTO 60
130   PRINT N1,N,X1,F
140   END