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Ingy döt Net 2023-07-01 11:58:00 -04:00
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Task/Find-the-missing-permutation/ZX-Spectrum-Basic/find-the-missing-permutation.basic Normal file
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10 LET l$="ABCD CABD ACDB DACB BCDA ACBD ADCB CDAB DABC BCAD CADB CDBA CBAD ABDC ADBC BDCA DCBA BACD BADC BDAC CBDA DBCA DCAB"
20 LET length=LEN l$
30 FOR a= CODE "A" TO CODE "D"
40 FOR b= CODE "A" TO CODE "D"
50 FOR c= CODE "A" TO CODE "D"
60 FOR d= CODE "A" TO CODE "D"
70 LET x$=""
80 IF a=b OR a=c OR a=d OR b=c OR b=d OR c=d THEN GO TO 140
90 LET x$=CHR$ a+CHR$ b+CHR$ c+CHR$ d
100 FOR i=1 TO length STEP 5
110 IF x$=l$(i TO i+3) THEN GO TO 140
120 NEXT i
130 PRINT x$;" is missing"
140 NEXT d: NEXT c: NEXT b: NEXT a