J ip(S p,I n){P('-'==*p,-ip(p+1,n-1))J j=0;N(n,j=10*j+p[i]-…

Twetch ·

J ip(S p,I n){P('-'==*p,-ip(p+1,n-1))J j=0;N(n,j=10*j+p[i]-'0')R j;}ZS hh(S s,C c){N(2,C a=i?c&15:c>>4;s[i]="0W"[9<a]+a)R s;}S px(J j){S s=b+23;unsigned long k=j;do hh(s-=2,k);W(k>>=8);R s;}