Lets say i want to calculate (1000C500)%MOD.
*My Code : *
*
*
long long ans=n;
for(int i=1;i<=r;i++) {
ans=(ans*(n-i+1))/i;
ans = ans%MOD;
}
But when the ans inside the loop starts exceeding MOD and you take
ans=ans%MOD then you cannot be sure to get the correct answer..
How to deal with this situation ?
--
Aamir Khan | 3rd Year | Computer Science & Engineering | IIT Roorkee
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