結果
問題 | No.2361 Many String Compare Queries |
ユーザー |
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提出日時 | 2023-06-23 22:04:35 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 107 ms / 2,500 ms |
コード長 | 15,543 bytes |
コンパイル時間 | 2,943 ms |
コンパイル使用メモリ | 180,388 KB |
最終ジャッジ日時 | 2025-02-15 01:04:44 |
ジャッジサーバーID (参考情報) |
judge4 / judge4 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 2 |
other | AC * 14 |
ソースコード
#pragma GCC optimize("O3")#pragma GCC optimize("unroll-loops")#include<iostream>#include<string>#include<cstdio>#include<vector>#include<cmath>#include<algorithm>#include<functional>#include<iomanip>#include<queue>#include<ciso646>#include<random>#include<map>#include<set>#include<bitset>#include<stack>#include<unordered_map>#include<unordered_set>#include<utility>#include<cassert>#include<complex>#include<numeric>#include<array>#include<chrono>using namespace std;//#define int long longtypedef long long ll;typedef unsigned long long ul;typedef unsigned int ui;//ll mod = 1;constexpr ll mod = 998244353;//constexpr ll mod = 1000000007;const int mod17 = 1000000007;const ll INF = mod * mod;typedef pair<int, int>P;#define rep(i,n) for(int i=0;i<n;i++)#define per(i,n) for(int i=n-1;i>=0;i--)#define Rep(i,sta,n) for(int i=sta;i<n;i++)#define rep1(i,n) for(int i=1;i<=n;i++)#define per1(i,n) for(int i=n;i>=1;i--)#define Rep1(i,sta,n) for(int i=sta;i<=n;i++)#define all(v) (v).begin(),(v).end()typedef pair<ll, ll> LP;using ld = long double;typedef pair<ld, ld> LDP;const ld eps = 1e-10;const ld pi = acosl(-1.0);template<typename T>void chmin(T& a, T b) {a = min(a, b);}template<typename T>void chmax(T& a, T b) {a = max(a, b);}template<typename T>vector<T> vmerge(vector<T>& a, vector<T>& b) {vector<T> res;int ida = 0, idb = 0;while (ida < a.size() || idb < b.size()) {if (idb == b.size()) {res.push_back(a[ida]); ida++;}else if (ida == a.size()) {res.push_back(b[idb]); idb++;}else {if (a[ida] < b[idb]) {res.push_back(a[ida]); ida++;}else {res.push_back(b[idb]); idb++;}}}return res;}template<typename T>void cinarray(vector<T>& v) {rep(i, v.size())cin >> v[i];}template<typename T>void coutarray(vector<T>& v) {rep(i, v.size()) {if (i > 0)cout << " "; cout << v[i];}cout << "\n";}ll mod_pow(ll x, ll n, ll m = mod) {if (n < 0) {ll res = mod_pow(x, -n, m);return mod_pow(res, m - 2, m);}if (abs(x) >= m)x %= m;if (x < 0)x += m;//if (x == 0)return 0;ll res = 1;while (n) {if (n & 1)res = res * x % m;x = x * x % m; n >>= 1;}return res;}//mod should be <2^31struct modint {int n;modint() :n(0) { ; }modint(ll m) {if (m < 0 || mod <= m) {m %= mod; if (m < 0)m += mod;}n = m;}operator int() { return n; }};bool operator==(modint a, modint b) { return a.n == b.n; }bool operator<(modint a, modint b) { return a.n < b.n; }modint operator+=(modint& a, modint b) { a.n += b.n; if (a.n >= mod)a.n -= (int)mod; return a; }modint operator-=(modint& a, modint b) { a.n -= b.n; if (a.n < 0)a.n += (int)mod; return a; }modint operator*=(modint& a, modint b) { a.n = ((ll)a.n * b.n) % mod; return a; }modint operator+(modint a, modint b) { return a += b; }modint operator-(modint a, modint b) { return a -= b; }modint operator*(modint a, modint b) { return a *= b; }modint operator^(modint a, ll n) {if (n == 0)return modint(1);modint res = (a * a) ^ (n / 2);if (n % 2)res = res * a;return res;}ll inv(ll a, ll p) {return (a == 1 ? 1 : (1 - p * inv(p % a, a)) / a + p);}modint operator/(modint a, modint b) { return a * modint(inv(b, mod)); }modint operator/=(modint& a, modint b) { a = a / b; return a; }const int max_n = 1 << 20;modint fact[max_n], factinv[max_n];void init_f() {fact[0] = modint(1);for (int i = 0; i < max_n - 1; i++) {fact[i + 1] = fact[i] * modint(i + 1);}factinv[max_n - 1] = modint(1) / fact[max_n - 1];for (int i = max_n - 2; i >= 0; i--) {factinv[i] = factinv[i + 1] * modint(i + 1);}}modint comb(int a, int b) {if (a < 0 || b < 0 || a < b)return 0;return fact[a] * factinv[b] * factinv[a - b];}modint combP(int a, int b) {if (a < 0 || b < 0 || a < b)return 0;return fact[a] * factinv[a - b];}ll gcd(ll a, ll b) {a = abs(a); b = abs(b);if (a < b)swap(a, b);while (b) {ll r = a % b; a = b; b = r;}return a;}template<typename T>void addv(vector<T>& v, int loc, T val) {if (loc >= v.size())v.resize(loc + 1, 0);v[loc] += val;}/*const int mn = 2000005;bool isp[mn];vector<int> ps;void init() {fill(isp + 2, isp + mn, true);for (int i = 2; i < mn; i++) {if (!isp[i])continue;ps.push_back(i);for (int j = 2 * i; j < mn; j += i) {isp[j] = false;}}}*///[,val)template<typename T>auto prev_itr(set<T>& st, T val) {auto res = st.lower_bound(val);if (res == st.begin())return st.end();res--; return res;}//[val,)template<typename T>auto next_itr(set<T>& st, T val) {auto res = st.lower_bound(val);return res;}using mP = pair<modint, modint>;mP operator+(mP a, mP b) {return { a.first + b.first,a.second + b.second };}mP operator+=(mP& a, mP b) {a = a + b; return a;}mP operator-(mP a, mP b) {return { a.first - b.first,a.second - b.second };}mP operator-=(mP& a, mP b) {a = a - b; return a;}LP operator+(LP a, LP b) {return { a.first + b.first,a.second + b.second };}LP operator+=(LP& a, LP b) {a = a + b; return a;}LP operator-(LP a, LP b) {return { a.first - b.first,a.second - b.second };}LP operator-=(LP& a, LP b) {a = a - b; return a;}mt19937 mt(time(0));const string drul = "DRUL";string senw = "SENW";//DRUL,or SENW//int dx[4] = { 1,0,-1,0 };//int dy[4] = { 0,1,0,-1 };//-----------------------------------------//https://github.com/atcoder/ac-librarynamespace internal {std::vector<int> sa_naive(const std::vector<int>& s) {int n = int(s.size());std::vector<int> sa(n);std::iota(sa.begin(), sa.end(), 0);std::sort(sa.begin(), sa.end(), [&](int l, int r) {if (l == r) return false;while (l < n && r < n) {if (s[l] != s[r]) return s[l] < s[r];l++;r++;}return l == n;});return sa;}std::vector<int> sa_doubling(const std::vector<int>& s) {int n = int(s.size());std::vector<int> sa(n), rnk = s, tmp(n);std::iota(sa.begin(), sa.end(), 0);for (int k = 1; k < n; k *= 2) {auto cmp = [&](int x, int y) {if (rnk[x] != rnk[y]) return rnk[x] < rnk[y];int rx = x + k < n ? rnk[x + k] : -1;int ry = y + k < n ? rnk[y + k] : -1;return rx < ry;};std::sort(sa.begin(), sa.end(), cmp);tmp[sa[0]] = 0;for (int i = 1; i < n; i++) {tmp[sa[i]] = tmp[sa[i - 1]] + (cmp(sa[i - 1], sa[i]) ? 1 : 0);}std::swap(tmp, rnk);}return sa;}// SA-IS, linear-time suffix array construction// Reference:// G. Nong, S. Zhang, and W. H. Chan,// Two Efficient Algorithms for Linear Time Suffix Array Constructiontemplate <int THRESHOLD_NAIVE = 10, int THRESHOLD_DOUBLING = 40>std::vector<int> sa_is(const std::vector<int>& s, int upper) {int n = int(s.size());if (n == 0) return {};if (n == 1) return { 0 };if (n == 2) {if (s[0] < s[1]) {return { 0, 1 };}else {return { 1, 0 };}}if (n < THRESHOLD_NAIVE) {return sa_naive(s);}if (n < THRESHOLD_DOUBLING) {return sa_doubling(s);}std::vector<int> sa(n);std::vector<bool> ls(n);for (int i = n - 2; i >= 0; i--) {ls[i] = (s[i] == s[i + 1]) ? ls[i + 1] : (s[i] < s[i + 1]);}std::vector<int> sum_l(upper + 1), sum_s(upper + 1);for (int i = 0; i < n; i++) {if (!ls[i]) {sum_s[s[i]]++;}else {sum_l[s[i] + 1]++;}}for (int i = 0; i <= upper; i++) {sum_s[i] += sum_l[i];if (i < upper) sum_l[i + 1] += sum_s[i];}auto induce = [&](const std::vector<int>& lms) {std::fill(sa.begin(), sa.end(), -1);std::vector<int> buf(upper + 1);std::copy(sum_s.begin(), sum_s.end(), buf.begin());for (auto d : lms) {if (d == n) continue;sa[buf[s[d]]++] = d;}std::copy(sum_l.begin(), sum_l.end(), buf.begin());sa[buf[s[n - 1]]++] = n - 1;for (int i = 0; i < n; i++) {int v = sa[i];if (v >= 1 && !ls[v - 1]) {sa[buf[s[v - 1]]++] = v - 1;}}std::copy(sum_l.begin(), sum_l.end(), buf.begin());for (int i = n - 1; i >= 0; i--) {int v = sa[i];if (v >= 1 && ls[v - 1]) {sa[--buf[s[v - 1] + 1]] = v - 1;}}};std::vector<int> lms_map(n + 1, -1);int m = 0;for (int i = 1; i < n; i++) {if (!ls[i - 1] && ls[i]) {lms_map[i] = m++;}}std::vector<int> lms;lms.reserve(m);for (int i = 1; i < n; i++) {if (!ls[i - 1] && ls[i]) {lms.push_back(i);}}induce(lms);if (m) {std::vector<int> sorted_lms;sorted_lms.reserve(m);for (int v : sa) {if (lms_map[v] != -1) sorted_lms.push_back(v);}std::vector<int> rec_s(m);int rec_upper = 0;rec_s[lms_map[sorted_lms[0]]] = 0;for (int i = 1; i < m; i++) {int l = sorted_lms[i - 1], r = sorted_lms[i];int end_l = (lms_map[l] + 1 < m) ? lms[lms_map[l] + 1] : n;int end_r = (lms_map[r] + 1 < m) ? lms[lms_map[r] + 1] : n;bool same = true;if (end_l - l != end_r - r) {same = false;}else {while (l < end_l) {if (s[l] != s[r]) {break;}l++;r++;}if (l == n || s[l] != s[r]) same = false;}if (!same) rec_upper++;rec_s[lms_map[sorted_lms[i]]] = rec_upper;}auto rec_sa =sa_is<THRESHOLD_NAIVE, THRESHOLD_DOUBLING>(rec_s, rec_upper);for (int i = 0; i < m; i++) {sorted_lms[i] = lms[rec_sa[i]];}induce(sorted_lms);}return sa;}} // namespace internalstd::vector<int> suffix_array(const std::vector<int>& s, int upper) {assert(0 <= upper);for (int d : s) {assert(0 <= d && d <= upper);}auto sa = internal::sa_is(s, upper);return sa;}template <class T> std::vector<int> suffix_array(const std::vector<T>& s) {int n = int(s.size());std::vector<int> idx(n);iota(idx.begin(), idx.end(), 0);sort(idx.begin(), idx.end(), [&](int l, int r) { return s[l] < s[r]; });std::vector<int> s2(n);int now = 0;for (int i = 0; i < n; i++) {if (i && s[idx[i - 1]] != s[idx[i]]) now++;s2[idx[i]] = now;}return internal::sa_is(s2, now);}std::vector<int> suffix_array(const std::string& s) {int n = int(s.size());std::vector<int> s2(n);for (int i = 0; i < n; i++) {s2[i] = s[i];}return internal::sa_is(s2, 255);}// Reference:// T. Kasai, G. Lee, H. Arimura, S. Arikawa, and K. Park,// Linear-Time Longest-Common-Prefix Computation in Suffix Arrays and Its// Applicationstemplate <class T>std::vector<int> lcp_array(const std::vector<T>& s,const std::vector<int>& sa) {int n = int(s.size());assert(n >= 1);std::vector<int> rnk(n);for (int i = 0; i < n; i++) {rnk[sa[i]] = i;}std::vector<int> lcp(n - 1);int h = 0;for (int i = 0; i < n; i++) {if (h > 0) h--;if (rnk[i] == 0) continue;int j = sa[rnk[i] - 1];for (; j + h < n && i + h < n; h++) {if (s[j + h] != s[i + h]) break;}lcp[rnk[i] - 1] = h;}return lcp;}std::vector<int> lcp_array(const std::string& s, const std::vector<int>& sa) {int n = int(s.size());std::vector<int> s2(n);for (int i = 0; i < n; i++) {s2[i] = s[i];}return lcp_array(s2, sa);}void solve() {int n, q; cin >> n >> q;string s; cin >> s;vector<int> l(q), r(q);rep(i, q) {cin >> l[i] >> r[i];l[i]--; r[i]--;}vector<ll> ans(q);auto sa = suffix_array(s);auto lcp = lcp_array(s, sa);vector<int> rev(n);rep(i, sa.size())rev[sa[i]] = i;vector<vector<int>> qs(n);rep(i, q) {qs[rev[l[i]]].push_back(i);}vector<ll> sum(n + 1);rep(i, n) {sum[i + 1] = sum[i] + n - sa[i];}//coutarray(sa);vector<int> locs;vector<int> lens;rep(i, n) {locs.push_back(i);lens.push_back(n - sa[i]);for (int id : qs[i]) {int len = r[id] - l[id] + 1;int loc = lower_bound(all(lens), len) - lens.begin();//cout << "? " << id << " " << locs[loc] << "\n";ans[id] += sum[locs[loc]];ans[id] += (ll)(len - 1) * (i - locs[loc] + 1);}if (i + 1 < n) {int las;while (lens.size() && lens.back() >= lcp[i]) {las = locs.back();lens.pop_back();locs.pop_back();}locs.push_back(las);lens.push_back(lcp[i]);}}//rep(i, q)cout << ans[i] << "\n";locs.clear();lens.clear();vector<ll> lensums;lensums.push_back(0);per(i, n) {locs.push_back(i);lens.push_back(n - sa[i]);lensums.push_back(lensums.back() + n - sa[i]);for (int id : qs[i]) {int len = r[id] - l[id] + 1;int loc = lower_bound(all(lens), len) - lens.begin();ans[id] += lensums[loc];ans[id] += (ll)(len - 1) * (locs[loc] - i);}if (i > 0) {int las;while (lens.size() && lens.back() >= lcp[i-1]) {las = locs.back();lens.pop_back();locs.pop_back();lensums.pop_back();}locs.push_back(las);lens.push_back(lcp[i-1]);ll adsum = (ll)(lcp[i - 1]) * (las - i + 1);lensums.push_back(lensums.back() + adsum);}}rep(i, q)cout << ans[i] << "\n";}signed main() {ios::sync_with_stdio(false);cin.tie(0);//cout << fixed<<setprecision(12);//init_f();//init();//while(true)//expr();//int t; cin >> t; rep(i, t)solve();return 0;}