Submission #20061

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
20061	2016-02-25 08:58:32	gs13068	로봇 (kriii4_F)	C++98	0 / 100	1000 ms	1084 KiB

F

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#include <cstdio>
const int p = 1000000007;
using namespace std;
int f(int x, int y)
{
  return y & 1 ? (long long)f(x, y ^ 1)*x%p : y ? f((long long)x*x%p, y >> 1) : 1;
}
int px[4] = { 1,0,-1,0 };
int py[4] = { 0,1,0,-1 };
int L, R, M;
int g(int n, int x, int y, int z)
{
  if (n == 0) return x*x + y*y;
  int a = (long long)g(n - 1, x + px[z], y + py[z], z) * M % p;
  z = z + 1 & 3;
  int b = (long long)g(n - 1, x + px[z], y + py[z], z) * L % p;
  z = z + 2 & 3;
  int c = (long long)g(n - 1, x + px[z], y + py[z], z) * R % p;
  return ((long long)a + b + c) * f(L + R + M, p - 2) % p;
}
int main()
{
  int n;
 
 
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• Subtask 1: 0 / 4
• Subtask 2: 0 / 96