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Ingy döt Net 2023-07-01 11:58:00 -04:00
parent 7387c8f97b
commit cb5bb5e222
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Task/Modular-inverse/Zkl/modular-inverse.zkl Normal file
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fcn gcdExt(a,b){
if(b==0) return(1,0,a);
q,r:=a.divr(b); s,t,g:=gcdExt(b,r); return(t,s-q*t,g);
}
fcn modInv(a,m){i,_,g:=gcdExt(a,m); if(g==1) {if(i<0)i+m} else Void}