const MOD: usize = 1_000000000 + 7; fn main() { let mut sc = Scanner::new(); let n = sc.next_usize(); if n >= MOD { println!("0"); return; } let mut ans = 1; let precalc = vec![1, 682498929,491101308,76479948,723816384,67347853,27368307,625544428,199888908,888050723,927880474,281863274,661224977,623534362,970055531,261384175,195888993,66404266,547665832,109838563,933245637,724691727,368925948,268838846,136026497,112390913,135498044,217544623,419363534,500780548,668123525,128487469,30977140,522049725,309058615,386027524,189239124,148528617,940567523,917084264,429277690,996164327,358655417,568392357,780072518,462639908,275105629,909210595,99199382,703397904,733333339,97830135,608823837,256141983,141827977,696628828,637939935,811575797,848924691,131772368,724464507,272814771,326159309,456152084,903466878,92255682,769795511,373745190,606241871,825871994,957939114,435887178,852304035,663307737,375297772,217598709,624148346,671734977,624500515,748510389,203191898,423951674,629786193,672850561,814362881,823845496,116667533,256473217,627655552,245795606,586445753,172114298,193781724,778983779,83868974,315103615,965785236,492741665,377329025,847549272,698611116, 0]; let mut j = 0; for i in 0..precalc.len() { if j + 10000000 > n { ans = precalc[i]; break; } j += 10000000; } for i in (j+1)..(n+1) { ans = ans * i % MOD; // if i % 10000000 == 0 { // print!("{},", ans); // } } println!("{}", ans); } struct Scanner { reader: std::io::Stdin, tokens: std::collections::VecDeque, } impl Scanner { fn new() -> Self { Scanner { reader: std::io::stdin(), tokens: std::collections::VecDeque::new(), } } fn next(&mut self) -> String { if self.tokens.is_empty() { let mut s = String::new(); loop { self.reader.read_line(&mut s).ok(); let s = s.trim(); if s.len() != 0 { for it in s.split_whitespace() { self.tokens.push_back(it.into()) } break; } } } self.tokens.pop_front().unwrap() } fn next_generics(&mut self) -> T where T: std::str::FromStr + std::marker::Copy, ::Err: std::fmt::Debug { self.next().parse().unwrap() } #[allow(dead_code)] fn next_i32(&mut self) -> i32 { self.next_generics::() } #[allow(dead_code)] fn next_i64(&mut self) -> i64 { self.next_generics::() } #[allow(dead_code)] fn next_u64(&mut self) -> u64 { self.next_generics::() } #[allow(dead_code)] fn next_usize(&mut self) -> usize { self.next_generics::() } }