import std.stdio, std.array, std.string, std.conv, std.algorithm; import std.typecons, std.range, std.random, std.math, std.container; import std.numeric, std.bigint, core.bitop; const long MOD = 10^^9+7; void main() { auto N = readln.chomp.to!int; long ans = 1; foreach (i; 0..N/2+N%2) { if (i == 0) ans = ans * 4 % MOD; else ans = ans * 5 % MOD; } ans.writeln; }