EDITORIAL for YVNUM (Unofficial)

lovemaydie · December 25, 2018, 9:26pm

I saw you have submitted it successfully. You precomputed the powers of 10. Maybe its a difference in the strict time limits for different languages!

lovemaydie · December 28, 2018, 2:16pm

Yes there are three mistakes in the modulus part

First you forgot the modulus
for(ll i=0;s[i]!=‘\0’;i++)
m+= ( (s[i]-48) * ten[l-1-i] )%mod;
m%= mod;

Second
you forgot modulus of the multiplication (s[i]-48) * ten[l-1]) % mod

m=( ( (m-((s[i]-48) * ten[l-1]) % mod + mod ) %mod ) * 10 ) % mod (s[i]-48)%mod;

Third
you forgot adding modulus value for subtration { (a - b + mod) % mod is correct rather than (a-b)%mod}

(m-((s[i]-48) * ten[l-1]) % mod + mod ) %mod