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## Discussion of Problem 1131. Copying

Wrong answer on Test Case 4:
Posted by FN2187 1 May 2018 11:13
Here is my code:
int main()
{
int N, K;
cin >> N >> K;
int connect = 1;
int temp = N;
int largepow = 0;
// calculate the largest power of 2 less than K
while(temp > 0)
{
if(pow(2, largepow) < K && pow(2, largepow + 1) < K)
largepow++;
temp /= 2;
}
N--;
int count = 0;
// count the hours
while(N > 0)
{
N -= connect;
count++;
if(connect < pow(2, largepow))
connect *= 2;
else if(connect >= pow(2, largepow) && connect < K)
connect++;
}
cout << count;
return 0;
}

Got WA4, then I tried something else:

int main ()
{
long long n, k, exp;
cin >> n >> k;
for (exp = 0; (1 << exp) < n && (1 << exp) < k; exp++)
if ((1 << exp) < n)
exp += ((n - (1 << exp) - 1) / k) + 1;
cout << exp;
return 0;
}
Test case 4 again. What is wrong?