結果
| 問題 |
No.2626 Similar But Different Name
|
| コンテスト | |
| ユーザー |
shobonvip
|
| 提出日時 | 2024-02-09 22:07:45 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 198 ms / 3,000 ms |
| コード長 | 4,098 bytes |
| コンパイル時間 | 4,234 ms |
| コンパイル使用メモリ | 261,228 KB |
| 最終ジャッジ日時 | 2025-02-19 03:42:33 |
|
ジャッジサーバーID (参考情報) |
judge2 / judge3 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 35 |
ソースコード
#include<bits/stdc++.h>
using namespace std;
//* ATCODER
#include<atcoder/all>
using namespace atcoder;
typedef modint998244353 mint;
//*/
/* BOOST MULTIPRECISION
#include<boost/multiprecision/cpp_int.hpp>
using namespace boost::multiprecision;
//*/
typedef long long ll;
#define rep(i, s, n) for (int i = (int)(s); i < (int)(n); i++)
#define rrep(i, s, n) for (int i = (int)(n)-1; i >= (int)(s); i--)
template <typename T> bool chmin(T &a, const T &b) {
if (a <= b) return false;
a = b;
return true;
}
template <typename T> bool chmax(T &a, const T &b) {
if (a >= b) return false;
a = b;
return true;
}
template <typename T> T max(vector<T> &a){
assert(!a.empty());
T ret = a[0];
for (int i=0; i<(int)a.size(); i++) chmax(ret, a[i]);
return ret;
}
template <typename T> T min(vector<T> &a){
assert(!a.empty());
T ret = a[0];
for (int i=0; i<(int)a.size(); i++) chmin(ret, a[i]);
return ret;
}
template <typename T> T sum(vector<T> &a){
T ret = 0;
for (int i=0; i<(int)a.size(); i++) ret += a[i];
return ret;
}
struct RollingHash {
using ull = unsigned long long;
RollingHash(const string& s = "") {
build(s);
}
ull get(int l, int r) {
assert(0 <= l && l <= r && r <= n);
return cal(inner_hash[r] + buf - mul(inner_hash[l], pow_base[r - l]));
}
static ull get_hash(const string& s) {
int len = s.size();
set_hash();
extend_pow_base(len);
ull res = 0;
rep(i, 0, len) res = cal(mul(res, BASE) + s[i]);
return res;
}
static ull concat(const ull& hash1, const ull& hash2, const int& len2) {
return cal(cal(mul(hash1, pow_base[len2])) + hash2);
}
private:
static constexpr ull MASK30 = (1ULL << 30) - 1;
static constexpr ull MASK31 = (1ULL << 31) - 1;
static constexpr ull MASK61 = (1ULL << 61) - 1;
static constexpr ull MOD = (1ULL << 61) - 1;
static constexpr ull buf = MOD * 4;
static ull BASE;
static vector<ull> pow_base;
static ull mul(ull a, ull b) {
ull au = a >> 31, ad = a & MASK31;
ull bu = b >> 31, bd = b & MASK31;
ull mid = ad * bu + au * bd;
ull midu = mid >> 30, midd = mid & MASK30;
return (au * bu * 2 + midu + (midd << 31) + ad * bd);
}
static ull cal(ull x) {
ull xu = x >> 61;
ull xd = x & MASK61;
ull res = xu + xd;
if (res >= MOD) res -= MOD;
return res;
}
static void set_hash() {
if (BASE == 0) BASE = (1UL << 31) + (random_device()() & MASK31);
}
static void extend_pow_base(int len) {
int nlen = pow_base.size();
if (nlen > len) return;
pow_base.resize(len + 1);
rep(i, nlen, len + 1) pow_base[i] = cal(mul(pow_base[i - 1], BASE));
}
string str;
int n;
vector<ull> inner_hash;
void build(const string& s) {
set_hash();
str = s;
n = s.size();
extend_pow_base(n);
inner_hash.resize(n + 1);
inner_hash[0] = 0;
rep(i, 0, n) inner_hash[i + 1] = cal(mul(inner_hash[i], BASE) + s[i]);
}
};
typedef unsigned long long ull;
ull RollingHash::BASE = 0;
vector<ull> RollingHash::pow_base = vector<ull>(1, 1);
using roriha = RollingHash;
int main(){
int n, m, k; cin >> n >> m >> k;
string s, t; cin >> s >> t;
string s_lower = s;
string t_lower = t;
vector<mint> s_up(n), s_down(n);
vector<mint> t_up(m), t_down(n);
rep(i,0,n){
if ('A' <= s[i] && s[i] <= 'Z'){
s_lower[i] = s[i] - 'A' + 'a';
s_up[i] += 1;
}else{
s_down[i] += 1;
}
}
rep(i,0,m){
if ('A' <= t[i] && t[i] <= 'Z'){
t_lower[i] = t[i] - 'A' + 'a';
t_up[m-1-i] += 1;
}else{
t_down[m-1-i] += 1;
}
}
vector<mint> over1 = convolution(s_up, t_down);
vector<mint> over2 = convolution(s_down, t_up);
roriha rh_s = RollingHash(s_lower);
roriha rh_t = RollingHash(t_lower);
int ans = 0;
rep(i,0,n-m+1){
mint tmp = over1[m-1+i] + over2[m-1+i];
if (1 <= tmp.val() && tmp.val() <= k){
if (rh_s.get(i,i+m) == rh_t.get(0,m)){
ans+=1;
}
}
}
cout << ans << '\n';
}
shobonvip