n = 1926081719260817
f = [0, 1, 1]
for i in range(3, n + 1):
f.append( ( f[i - 1] + f[i - 2] ) % n )
flag = "cnss{" + hex(f[n])[2:] + "}"
print(flag)
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#include
int main()
{
long long int n =1926081719260817;
long long int a = 1, b = 1, c, i = 1;
while (i < n)
{
i++;
c = a;
a = b%n;
b = a + c;
}
a=a%n;
printf("%lld", a);
return 0;
}