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-4 bytes; added 96 characters in body

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edited Jul 4 at 15:14

C (gcc), 5454 50 bytes

-4 bytes thanks to Mukundan314

i;f(s,l){for(i=1;i<l;putsi=1;i<l;i*=2)puts(strndup(s+i/2-1,i/2)))i*=2;;}

May have a memory leak or two.

i;f(s,l){for(i=1;i<l;puts(strndup(s+i/2-1,i/2)))i*=2;}

-4 bytes thanks to Mukundan314

i;f(s,l){for(i=1;i<l;i*=2)puts(strndup(s+i-1,i));}

May have a memory leak or two.

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created Jul 3 at 21:14

i;f(s,l){for(i=1;i<l;puts(strndup(s+i/2-1,i/2)))i*=2;}