#[doc = " https://github.com/hatoo/competitive-rust-snippets"] #[allow(unused_imports)] use std::cmp::{max, min, Ordering}; #[allow(unused_imports)] use std::collections::{BTreeMap, BTreeSet, BinaryHeap, HashMap, HashSet, VecDeque}; #[allow(unused_imports)] use std::iter::FromIterator; #[macro_export] macro_rules ! chmax { ( $ x : expr , $ ( $ v : expr ) ,+ ) => { $ ( $ x = std :: cmp :: max ( $ x ,$ v ) ; ) + } ; } #[macro_export] macro_rules ! chmin { ( $ x : expr , $ ( $ v : expr ) ,+ ) => { $ ( $ x = std :: cmp :: min ( $ x ,$ v ) ; ) + } ; } #[macro_export] macro_rules ! max { ( $ x : expr ) => ( $ x ) ; ( $ x : expr , $ ( $ xs : expr ) ,+ ) => { std :: cmp :: max ( $ x , max ! ( $ ( $ xs ) ,+ ) ) } ; } #[macro_export] macro_rules ! min { ( $ x : expr ) => ( $ x ) ; ( $ x : expr , $ ( $ xs : expr ) ,+ ) => { std :: cmp :: min ( $ x , min ! ( $ ( $ xs ) ,+ ) ) } ; } #[macro_export] macro_rules ! dvec { ( $ t : expr ; $ len : expr ) => { vec ! [ $ t ; $ len ] } ; ( $ t : expr ; $ len : expr , $ ( $ rest : expr ) ,* ) => { vec ! [ dvec ! ( $ t ; $ ( $ rest ) ,* ) ; $ len ] } ; } #[macro_export] macro_rules ! cfor { ( ; $ ( $ rest : tt ) * ) => { cfor ! ( ( ) ; $ ( $ rest ) * ) } ; ( $ ( $ init : stmt ) ,+; ; $ ( $ rest : tt ) * ) => { cfor ! ( $ ( $ init ) ,+; ! false ; $ ( $ rest ) * ) } ; ( $ ( $ init : stmt ) ,+; $ cond : expr ; ; $ body : block ) => { cfor ! { $ ( $ init ) ,+; $ cond ; ( ) ; $ body } } ; ( $ ( $ init : stmt ) ,+; $ cond : expr ; $ ( $ step : expr ) ,+; $ body : block ) => { { $ ( $ init ; ) + while $ cond { let mut _first = true ; let mut _continue = false ; loop { if ! _first { _continue = true ; break } _first = false ; $ body } if ! _continue { break } $ ( $ step ; ) + } } } ; } #[doc = " main"] #[allow(unused_imports)] use std::io::{stdin, stdout, BufWriter, Write}; #[macro_export] macro_rules ! input { ( source = $ s : expr , $ ( $ r : tt ) * ) => { let mut parser = Parser :: from_str ( $ s ) ; input_inner ! { parser , $ ( $ r ) * } } ; ( parser = $ parser : ident , $ ( $ r : tt ) * ) => { input_inner ! { $ parser , $ ( $ r ) * } } ; ( new_stdin_parser = $ parser : ident , $ ( $ r : tt ) * ) => { let stdin = std :: io :: stdin ( ) ; let reader = std :: io :: BufReader :: new ( stdin . lock ( ) ) ; let mut $ parser = Parser :: new ( reader ) ; input_inner ! { $ parser , $ ( $ r ) * } } ; ( $ ( $ r : tt ) * ) => { input ! { new_stdin_parser = parser , $ ( $ r ) * } } ; } #[macro_export] macro_rules ! input_inner { ( $ parser : ident ) => { } ; ( $ parser : ident , ) => { } ; ( $ parser : ident , $ var : ident : $ t : tt $ ( $ r : tt ) * ) => { let $ var = read_value ! ( $ parser , $ t ) ; input_inner ! { $ parser $ ( $ r ) * } } ; } #[macro_export] macro_rules ! read_value { ( $ parser : ident , ( $ ( $ t : tt ) ,* ) ) => { ( $ ( read_value ! ( $ parser , $ t ) ) ,* ) } ; ( $ parser : ident , [ $ t : tt ; $ len : expr ] ) => { ( 0 ..$ len ) . map ( | _ | read_value ! ( $ parser , $ t ) ) . collect ::< Vec < _ >> ( ) } ; ( $ parser : ident , chars ) => { read_value ! ( $ parser , String ) . chars ( ) . collect ::< Vec < char >> ( ) } ; ( $ parser : ident , usize1 ) => { read_value ! ( $ parser , usize ) - 1 } ; ( $ parser : ident , $ t : ty ) => { $ parser . next ::<$ t > ( ) . expect ( "Parse error" ) } ; } use std::io; use std::io::BufRead; use std::str; pub struct Parser { reader: R, buf: Vec, pos: usize, } impl Parser { pub fn from_str(s: &str) -> Parser { Parser { reader: io::empty(), buf: s.as_bytes().to_vec(), pos: 0, } } } impl Parser { pub fn new(reader: R) -> Parser { Parser { reader: reader, buf: vec![], pos: 0, } } pub fn update_buf(&mut self) { self.buf.clear(); self.pos = 0; loop { let (len, complete) = { let buf2 = self.reader.fill_buf().unwrap(); self.buf.extend_from_slice(buf2); let len = buf2.len(); if len == 0 { break; } (len, buf2[len - 1] <= 0x20) }; self.reader.consume(len); if complete { break; } } } pub fn next(&mut self) -> Result { loop { let mut begin = self.pos; while begin < self.buf.len() && (self.buf[begin] <= 0x20) { begin += 1; } let mut end = begin; while end < self.buf.len() && (self.buf[end] > 0x20) { end += 1; } if begin != self.buf.len() { self.pos = end; return str::from_utf8(&self.buf[begin..end]).unwrap().parse::(); } else { self.update_buf(); } } } } #[allow(unused_macros)] macro_rules ! debug { ( $ ( $ a : expr ) ,* ) => { eprintln ! ( concat ! ( $ ( stringify ! ( $ a ) , " = {:?}, " ) ,* ) , $ ( $ a ) ,* ) ; } } #[doc = " https://github.com/hatoo/competitive-rust-snippets"] const BIG_STACK_SIZE: bool = true; #[allow(dead_code)] fn main() { use std::thread; if BIG_STACK_SIZE { thread::Builder::new() .stack_size(32 * 1024 * 1024) .name("solve".into()) .spawn(solve) .unwrap() .join() .unwrap(); } else { solve(); } } fn solve() { let out = stdout(); let mut out = BufWriter::new(out.lock()); input!{ S:chars, T:chars, } let n = S.len(); let m = T.len(); let mut s = vec![]; for i in 0..n { let c = S[i]; s.push(c as u64 - 'a' as u64); } let mut t = vec![]; for i in 0..m { let c = T[i]; t.push(c as u64 - 'a' as u64); } let pat = KMP::new(t); let mut seg: SEG = SEG::new(n); let head = pat.search(&s); for l in head { let r = l+m; if seg.query(l, r) == 0 { seg.update(r-1,1); } } let cnt = seg.query(0, n); writeln!(out,"{}",cnt); } #[allow(dead_code)] struct SUM; impl Monoid for SUM { type T = i64; fn id() -> Self::T { 0 } fn op(a: &Self::T, b: &Self::T) -> Self::T { *a + *b } } #[allow(dead_code)] pub trait Monoid { type T: Clone; fn id() -> Self::T; fn op(a: &Self::T, b: &Self::T) -> Self::T; } #[allow(dead_code)] pub struct SEG { n: usize, buf: Vec, } impl SEG { #[allow(dead_code)] pub fn new(n: usize) -> SEG { let mut m = 1; while m < n { m *= 2; } SEG { n: m, buf: vec![M::id().clone(); 2 * m], } } #[allow(dead_code)] pub fn update(&mut self, k: usize, a: M::T) { let mut k = k + self.n; self.buf[k] = a; while k > 1 { k = k >> 1; self.buf[k] = M::op(&self.buf[k * 2], &self.buf[k * 2 + 1]); } } #[allow(dead_code)] pub fn get(&self, k: usize) -> M::T { self.buf[k + self.n].clone() } pub fn do_query(&self, a: usize, b: usize, k: usize, l: usize, r: usize) -> M::T { if r <= a || b <= l { return M::id(); } if a <= l && r <= b { return self.buf[k].clone(); } else { let vl = self.do_query(a, b, k * 2, l, (l + r) / 2); let vr = self.do_query(a, b, k * 2 + 1, (l + r) / 2, r); return M::op(&vl, &vr); } } #[allow(dead_code)] pub fn query(&self, a: usize, b: usize) -> M::T { self.do_query(a, b, 1, 0, self.n) } } struct KMP { pat: Vec, tbl: Vec, } impl KMP { #[doc = "O(K)"] fn new(pat: Vec) -> Self { let n = pat.len(); let mut tbl = vec![0; n + 1]; tbl[0] = -1; let mut j: i64 = -1; for i in 0..n { while j >= 0 && pat[i] != pat[j as usize] { j = tbl[j as usize]; } j += 1; if i + 1 < n && pat[i + 1] == pat[j as usize] { tbl[i + 1] = tbl[j as usize]; } else { tbl[i + 1] = j; } } KMP { pat: pat, tbl: tbl } } #[doc = "Find all the appearance of the pattern string. O(N)"] fn search(&self, s: &[u64]) -> Vec { let mut res = vec![]; let mut head: i64 = 0; let mut j: i64 = 0; while head + j < s.len() as i64 { if self.pat[j as usize] == s[(head + j) as usize] { j += 1; if j != self.pat.len() as i64 { continue; } res.push(head as usize); } head += j - self.tbl[j as usize]; j = std::cmp::max(self.tbl[j as usize], 0); } res } }