結果
| 問題 |
No.3239 Omnibus
|
| コンテスト | |
| ユーザー |
kwm_t
|
| 提出日時 | 2025-08-16 14:33:27 |
| 言語 | C++23 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 591 ms / 10,000 ms |
| コード長 | 6,120 bytes |
| コンパイル時間 | 3,407 ms |
| コンパイル使用メモリ | 301,140 KB |
| 実行使用メモリ | 30,464 KB |
| 最終ジャッジ日時 | 2025-08-16 14:33:48 |
| 合計ジャッジ時間 | 18,425 ms |
|
ジャッジサーバーID (参考情報) |
judge2 / judge5 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 1 |
| other | AC * 33 |
ソースコード
#include <bits/stdc++.h>
//#include <atcoder/all>
using namespace std;
//using namespace atcoder;
//using mint = modint1000000007;
//const int mod = 1000000007;
//using mint = modint998244353;
//const int mod = 998244353;
//const int INF = 1e9;
//const long long LINF = 1e18;
#define rep(i, n) for (int i = 0; i < (n); ++i)
#define rep2(i,l,r)for(int i=(l);i<(r);++i)
#define rrep(i, n) for (int i = (n) - 1; i >= 0; --i)
#define rrep2(i,l,r)for(int i=(r) - 1;i>=(l);--i)
#define all(x) (x).begin(),(x).end()
#define allR(x) (x).rbegin(),(x).rend()
#define P pair<long long,long long>
template<typename A, typename B> inline bool chmax(A & a, const B & b) { if (a < b) { a = b; return true; } return false; }
template<typename A, typename B> inline bool chmin(A & a, const B & b) { if (a > b) { a = b; return true; } return false; }
// https://lorent-kyopro.hatenablog.com/entry/2021/03/12/025644
template <class S, S(*op)(S, S), S(*e)()> class dynamic_segtree {
public:
//dynamic_segtree() : n(0), root(nullptr) {}
dynamic_segtree(size_t n) : n(n), root(nullptr) {}
void set(size_t p, S x) {
assert(p < n);
set(root, 0, n, p, x);
}
S get(size_t p) const {
assert(p < n);
return get(root, 0, n, p);
}
S prod(size_t l, size_t r) const {
if (l >= r)return e();
assert(l <= r && r <= n);
return prod(root, 0, n, l, r);
}
S all_prod() const { return root ? root->product : e(); }
void reset(size_t l, size_t r) {
assert(l <= r && r <= n);
return reset(root, 0, n, l, r);
}
template <bool(*f)(S)> size_t max_right(size_t l) const {
return max_right(l, [](S x) { return f(x); });
}
template <class F> size_t max_right(size_t l, const F& f) const {
assert(l <= n);
S product = e();
assert(f(product));
return max_right(root, 0, n, l, f, product);
}
template <bool(*f)(S)> size_t min_left(size_t r) const {
return min_left(r, [](S x) { return f(x); });
}
template <class F> size_t min_left(size_t r, const F& f) const {
assert(r <= n);
S product = e();
assert(f(product));
return min_left(root, 0, n, r, f, product);
}
private:
struct node;
using node_ptr = std::unique_ptr<node>;
struct node {
size_t index;
S value, product;
node_ptr left, right;
node(size_t index, S value)
: index(index),
value(value),
product(value),
left(nullptr),
right(nullptr) {}
void update() {
product = op(op(left ? left->product : e(), value),
right ? right->product : e());
}
};
const size_t n;
node_ptr root;
void set(node_ptr& t, size_t a, size_t b, size_t p, S x) const {
if (!t) {
t = std::make_unique<node>(p, x);
return;
}
if (t->index == p) {
t->value = x;
t->update();
return;
}
size_t c = (a + b) >> 1;
if (p < c) {
if (t->index < p) std::swap(t->index, p), std::swap(t->value, x);
set(t->left, a, c, p, x);
}
else {
if (p < t->index) std::swap(p, t->index), std::swap(x, t->value);
set(t->right, c, b, p, x);
}
t->update();
}
S get(const node_ptr& t, size_t a, size_t b, size_t p) const {
if (!t) return e();
if (t->index == p) return t->value;
size_t c = (a + b) >> 1;
if (p < c) return get(t->left, a, c, p);
else return get(t->right, c, b, p);
}
S prod(const node_ptr& t, size_t a, size_t b, size_t l, size_t r) const {
if (!t || b <= l || r <= a) return e();
if (l <= a && b <= r) return t->product;
size_t c = (a + b) >> 1;
S result = prod(t->left, a, c, l, r);
if (l <= t->index && t->index < r) result = op(result, t->value);
return op(result, prod(t->right, c, b, l, r));
}
void reset(node_ptr& t, size_t a, size_t b, size_t l, size_t r) const {
if (!t || b <= l || r <= a) return;
if (l <= a && b <= r) {
t.reset();
return;
}
size_t c = (a + b) >> 1;
reset(t->left, a, c, l, r);
reset(t->right, c, b, l, r);
t->update();
}
template <class F>
size_t max_right(const node_ptr& t, size_t a, size_t b,
size_t l, const F& f, S& product) const {
if (!t || b <= l) return n;
if (f(op(product, t->product))) {
product = op(product, t->product);
return n;
}
size_t c = (a + b) >> 1;
size_t result = max_right(t->left, a, c, l, f, product);
if (result != n) return result;
if (l <= t->index) {
product = op(product, t->value);
if (!f(product)) return t->index;
}
return max_right(t->right, c, b, l, f, product);
}
template <class F>
size_t min_left(const node_ptr& t, size_t a, size_t b,
size_t r, const F& f, S& product) const {
if (!t || r <= a) return 0;
if (f(op(t->product, product))) {
product = op(t->product, product);
return 0;
}
size_t c = (a + b) >> 1;
size_t result = min_left(t->right, c, b, r, f, product);
if (result != 0) return result;
if (t->index < r) {
product = op(t->value, product);
if (!f(product)) return t->index + 1;
}
return min_left(t->left, a, c, r, f, product);
}
};
P op(P a, P b) {
return { a.first + b.first,a.second + b.second };
}
P e() { return { 0,0 }; }
int main() {
std::ios::sync_with_stdio(false);
std::cin.tie(nullptr);
int n, q; cin >> n >> q;
string s; cin >> s;
vector<dynamic_segtree<P, op, e>> seg;
seg.reserve(26 * 26 * 26);
for (int i = 0; i < 26 * 26 * 26; i++) {
seg.emplace_back(n);
}
auto encode = [&](int index)->int {
int x = 0;
rep(i, 3) {
x *= 26;
x += s[index + i] - 'a';
}
return x;
};
auto encode2 = [&](string s)->int {
int x = 0;
rep(i, 3) {
x *= 26;
x += s[i] - 'a';
}
return x;
};
rep(i, n - 2) {
seg[encode(i)].set(i, { i,1 });
}
while (q--) {
int t; cin >> t;
if (t == 1) {
int k; cin >> k;
char c; cin >> c;
k--;
rep2(idx, k - 2, k + 1) {
if (idx < 0)continue;
if (idx >= n - 2)continue;
seg[encode(idx)].set(idx, e());
}
s[k] = c;
rep2(idx, k - 2, k + 1) {
if (idx < 0)continue;
if (idx >= n - 2)continue;
seg[encode(idx)].set(idx, { idx,1 });
}
}
else {
int l, r; cin >> l >> r;
l--, r--;
string s; cin >> s;
auto key = encode2(s);
auto val = seg[key].prod(l, r - 1);
long long ans = val.first - val.second*(l - 1);
cout << ans << endl;
}
}
return 0;
}
kwm_t