#include <bits/stdc++.h>
using namespace std;
#define int long long
#define inf 0x3F3F3F3F3F3F3F3F
const int MXN = 3e5 + 5;
const int LOG = 20;
const int mod = 1e9 + 7;
int b1, b2;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
int add(int a, int b)
{
return (a + b + mod) % mod;
}
int mult(int a, int b)
{
return (a * b) % mod;
}
int pw(int a, int b, int c)
{
a %= c;
int res = 1;
while (b)
{
if (b & 1) res = mult(res, a);
a = mult(a, a);
b >>= 1;
}
return res;
}
int ph[2][MXN], p[2][MXN], invp[2][MXN];
int get_hash(int l, int r, int id)
{
return mult(add(ph[id][r], -ph[id][l - 1]), invp[id][l]);
}
void _HASH(string &s, int id)
{
for (int i = 1; i < s.length(); i++)
{
ph[id][i] = add(ph[id][i - 1], mult(p[id][i], s[i] - 'a' + 1));
}
}
map<array<int, 2>, int> mp;
int R[MXN];
int ans[MXN];
vector<array<int, 2>> q[MXN];
int n, k, m;
string s, t[MXN];
int par[LOG][MXN];
int inter(array<int, 2> x, array<int, 2> y)
{
return max(x[0], y[0]) <= min(x[1], y[1]);
}
signed main()
{
ios_base::sync_with_stdio(0);
cin.tie(0);
b1 = rng() % (mod - 1) + 1, b2 = rng() % (mod - 1) + 1;
p[0][0] = p[1][0] = 1, invp[0][0] = invp[1][0] = 1;
for (int i = 1; i < MXN; i++)
{
p[0][i] = mult(p[0][i - 1], b1);
p[1][i] = mult(p[1][i - 1], b2);
invp[0][i] = pw(p[0][i], mod - 2, mod);
invp[1][i] = pw(p[1][i], mod - 2, mod);
}
cin >> k >> m;
for (int i = 0; i < k; i++) cin >> t[i];
cin >> s;
n = s.length();
s = "#" + s;
_HASH(s, 0);
_HASH(s, 1);
for (int i = 0; i < k; i++)
{
int h1 = 0, h2 = 0;
for (int j = 0; j < t[i].length(); j++)
{
h1 = add(h1, mult(t[i][j] - 'a' + 1, p[0][j]));
h2 = add(h2, mult(t[i][j] - 'a' + 1, p[1][j]));
mp[{h1, h2}] = 1;
}
}
for (int i = 1; i <= n; i++)
{
if (mp.find({get_hash(i, i, 0), get_hash(i, i, 1)}) == mp.end()) continue;
int l = i, r = n;
while (l < r)
{
int mid = (l + r + 1) >> 1;
if (mp.find({get_hash(i, mid, 0), get_hash(i, mid, 1)}) != mp.end()) l = mid;
else r = mid - 1;
}
R[i] = l + 1;
}
vector<int> v;
for (int i = n; i >= 1; i--)
{
while (!v.empty() && R[v.back()] <= R[i]) v.pop_back();
if (v.empty() || !R[i])
{
par[0][i] = 0;
}
else
{
int l = 0, r = (int)v.size() - 1;
while (l < r)
{
int mid = (l + r) >> 1;
if (v[mid] > R[i]) l = mid + 1;
else r = mid;
}
if (v[r] <= R[i]) par[0][i] = v[r];
}
if (R[i])
{
v.push_back(i);
}
}
for (int i = 1; i < LOG; i++) for (int j = 1; j <= n; j++) par[i][j] = par[i - 1][par[i - 1][j]];
for (int i = 0; i < m; i++)
{
int l, r, res = 0;
cin >> l >> r;
l++;
for (int i = LOG - 1; i >= 0; i--)
{
if (!par[i][l] || par[i][l] > r) continue;
l = par[i][l];
res |= (1LL << i);
}
if (R[l] <= r) cout << -1 << '\n';
else cout << res + 1 << '\n';
}
}
Compilation message
Main.cpp: In function 'void _HASH(std::string&, long long int)':
Main.cpp:45:21: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
45 | for (int i = 1; i < s.length(); i++)
| ~~^~~~~~~~~~~~
Main.cpp: In function 'int main()':
Main.cpp:86:23: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
86 | for (int j = 0; j < t[i].length(); j++)
| ~~^~~~~~~~~~~~~~~
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
71 ms |
26452 KB |
Output is correct |
| 2 |
Incorrect |
257 ms |
53332 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Incorrect |
1274 ms |
93420 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
71 ms |
26452 KB |
Output is correct |
| 2 |
Incorrect |
257 ms |
53332 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
