Submission #22296

#	Time	Username	Problem	Language	Result	Execution time	Memory
22296		Lazy Against The Machine (#40)	Fully Generate (KRIII5_FG)	C++14	0 / 7	0 ms	952 KiB

FG

#include <stdio.h>

long long arr[40000000];
long long nuj[40000000];
long long pro[40000000];
long long pr2[40000000];

long long mod = 1000000007;
// calculate n^k % m
long long modpow(long long n, long long  k)
{
	long long ret = 1;
	n %= mod;
	while (k)
	{
		if (k & 1)
			ret = (ret * n) % mod;
		n = (n * n) % mod;
		k /= 2;
	}
	return ret;
}

int main()
{
	arr[1] = 1;
	arr[2] = 2;
	nuj[1] = 1;
	nuj[2] = 3;
	pro[1] = 1;
	pro[2] = 2;
	pr2[1] = 1;
	pr2[2] = 2;

	long long sum = 1;
	long long start = 2;

	long long end = 2;

	int n;
	scanf("%d", &n);

	for (int i = 2;; i++)
	{
		for (int j = 0; j < arr[i] ; j++)
		{
			arr[start + j] = i;
			nuj[start + j] = nuj[start + j - 1] + i;
			pro[start + j] = (pro[start + j - 1] * i) % mod;
			if (nuj[start + j] >= n)
			{
				end = start + j;
				goto hell;
			}
		}
		start += arr[i];
	}
	hell:
	for (int i = 2; i < end; i++)
	{
		pr2[i] = (pr2[i - 1] * modpow(i, arr[i])) % mod;
	}
	printf("%lld", (pr2[end - 1] * modpow(end, n - nuj[end - 1])) % mod);

	return -0;
}

Compilation message (stderr)

FG.cpp: In function 'int main()':
FG.cpp:35:12: warning: unused variable 'sum' [-Wunused-variable]
  long long sum = 1;
            ^
FG.cpp:41:17: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &n);
                 ^

• Subtask 1: 0 / 2
• Subtask 2: 0 / 5