結果
| 問題 |
No.2162 Copy and Paste 2
|
| コンテスト | |
| ユーザー |
miscalc
|
| 提出日時 | 2021-08-28 02:35:13 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 2,423 bytes |
| コンパイル時間 | 2,608 ms |
| コンパイル使用メモリ | 211,832 KB |
| 最終ジャッジ日時 | 2025-01-24 03:50:43 |
|
ジャッジサーバーID (参考情報) |
judge1 / judge3 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 15 WA * 11 |
ソースコード
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#include <atcoder/lazysegtree>
using namespace atcoder;
int mymax(int a, int b)
{
return max(a, b);
}
int e()
{
return 0;
}
class rollinghash
{
public:
const ll MOD = (1LL << 61) - 1;
const ll MASK61 = MOD;
const ll MASK31 = (1LL << 31) - 1;
const ll MASK30 = (1LL << 30) - 1;
const ll POSITIVISER = 3 * MOD;
ll Base;
ll mul(ll a, ll b)
{
ll au = a >> 31; // (a / MASK31)
ll ad = a & MASK31; // (a % MASK31)
ll bu = b >> 31;
ll bd = b & MASK31;
ll m = au * bd + ad * bu;
ll mu = m >> 30;
ll md = m & MASK30;
return au * bu * 2 + mu + (md << 31) + ad * bd;
}
ll calcmod(ll x)
{
ll xu = x >> 61;
ll xd = x & MASK61;
ll ret = xu + xd;
if (ret >= MOD)
ret -= MOD;
return ret;
}
vector<ll> powmem;
vector<ll> hash;
rollinghash(string S)
{
ll N = S.size();
srand((unsigned)time(NULL));
Base = rand() % 1024 + 256;
powmem.resize(N + 1);
powmem.at(0) = 1;
for (ll i = 0; i < N; i++)
{
powmem.at(i + 1) = powmem.at(i) * Base;
}
hash.resize(N + 1);
hash.at(0) = 1;
for (ll i = 0; i < N; i++)
{
hash.at(i + 1) = hash.at(i) * Base + S.at(i);
}
}
ll sub(ll pos, ll len)
{
return hash.at(pos + len) - hash.at(pos) * powmem.at(len);
}
};
int main()
{
string S;
cin >> S;
int N = S.size();
S += string(N + 10, '.');
rollinghash rh(S);
vector<int> Z(N);
for (int i = 0; i < N; i++)
{
int ok = 0, ng = N + 1;
while (abs(ok - ng) > 1)
{
int mid = (ok + ng) / 2;
if (rh.sub(0, mid) == rh.sub(i, mid))
ok = mid;
else
ng = mid;
}
Z.at(i) = ok;
}
for (int i = 0; i < N; i++)
{
Z.at(i) = min(Z.at(i), i);
}
vector<vector<int>> invZ(N);
set<int> st;
for (int i = 0; i < N; i++)
{
if (Z.at(i) >= 2)
{
invZ.at(Z.at(i)).push_back(i);
st.emplace(i);
}
}
st.emplace(N + 1);
lazy_segtree<int, mymax, e, int, mymax, mymax, e> dp(N + 1);
for (int j = 2; j < N; j++)
{
int cnt = dp.get(j) + j - 2;
int i = *st.begin() + j;
while (i < N + 1)
{
dp.apply(i, N + 1, cnt);
cnt += j - 1;
i = *st.lower_bound(i) + j;
}
for (auto ii : invZ.at(j))
{
st.erase(ii);
}
}
int ans = N - dp.get(N);
cout << ans << endl;
}
miscalc