#![allow(non_snake_case)] #![allow(dead_code)] #![allow(unused_macros)] #![allow(unused_imports)] use std::cmp::*; use std::collections::*; macro_rules! input { (source = $s:expr, $($r:tt)*) => { let mut iter = $s.split_whitespace(); input_inner!{iter, $($r)*} }; ($($r:tt)*) => { let s = { use std::io::Read; let mut s = String::new(); std::io::stdin().read_to_string(&mut s).unwrap(); s }; let mut iter = s.split_whitespace(); input_inner!{iter, $($r)*} }; } macro_rules! input_inner { ($iter:expr) => {}; ($iter:expr, ) => {}; ($iter:expr, $var:ident : $t:tt $($r:tt)*) => { let $var = read_value!($iter, $t); input_inner!{$iter $($r)*} }; ($iter:expr, mut $var:ident : $t:tt $($r:tt)*) => { let mut $var = read_value!($iter, $t); input_inner!{$iter $($r)*} } } macro_rules! read_value { ($iter:expr, ( $($t:tt),* )) => { ( $(read_value!($iter, $t)),* ) }; ($iter:expr, [ $t:tt ; $len:expr ]) => { (0..$len).map(|_| read_value!($iter, $t)).collect::>() }; ($iter:expr, chars) => { read_value!($iter, String).chars().collect::>() }; ($iter:expr, usize1) => { read_value!($iter, usize) - 1 }; ($iter:expr, $t:ty) => { $iter.next().unwrap().parse::<$t>().expect("Parse error") }; } macro_rules! chmax { ($x:expr, $e:expr) => { if $x < $e { $x = $e; } }; } macro_rules! chmin { ($x:expr, $e:expr) => { if $x > $e { $x = $e; } }; } const INF: i64 = 1 << 60; fn main() { input!{ S: String, T: String, } let mut pos = 0; let mut ans = 0; while pos + T.len() - 1 < S.len() { if S[pos..pos + T.len()] == T { pos += if T.len() != 1 { T.len() - 1 } else { 1 }; ans += 1; } else { pos += 1; } } if T.len() == 1 && ans > 0 { println!("-1"); } else { println!("{}", ans); } }