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Submission #1001594

# Submission time Handle Problem Language Result Execution time Memory
1001594 2024-06-19T06:23:49 Z vjudge1 Dabbeh (INOI20_dabbeh) C++17
0 / 100
 2000 ms 302320 KB 
#include <bits/stdc++.h>
using namespace std;
namespace hsg {
  mt19937_64 rng(chrono::steady_clock().now().time_since_epoch().count());
  const long long mod = (long long)1e18+9;
  long long R=rng()%(mod);
  struct PolyHash {
    vector<long long> pref,pw;
    int n;
    PolyHash(string s) {
      n = s.size();
      pref.resize(n+1);
      pw.resize(n+1);
      pw[0]=1;
      for(int i = 1;i<=n;i++) {
        pref[i] = ((__int128_t)pref[i-1]*R)%mod;
        pref[i]+=s[i-1];
        pref[i]%=mod;
        pw[i] = ((__int128_t)pw[i-1]*R)%mod;
      }
    }
    long long get(int l, int r) {
 
      long long hs=(pref[r]-((__int128_t)pref[l-1]*pw[r-l+1])%mod + mod)%mod;
      return hs;
    }
  };
};
const int LL = 3e5+10;
const int LG = 20;
int up[LL][LG];
int nxt[LL];
bool cmp(const string& A, const string &B)  {
  return A.size() < B.size();
};
int get(int l, int r) {
  int at = l;
  int ans=1;
  while(nxt[at] < r) {
    if(at == up[at][0]) {
      return -1;
    }
    at = up[at][0];
    ans++;
  }
  return ans;
}
int main () {
  cin.tie(0)->sync_with_stdio(0);
  int n, m;
  cin >> n >> m;
  string s[n];
  for(int i =0;i<n;i++) {
    cin >> s[i];
  }
  sort(s, s+n, cmp);
  string S;
  cin >> S;
  int L = S.size();
  vector<pair<int,int>> inv;
  memset(nxt, -1, sizeof nxt);
  int idx[L];
  hsg::PolyHash hs(S);
  map<long long, bool> mp[L+1];
  for(int i = 0;i<n;i++) {
    hsg::PolyHash hss(s[i]);
    for(int j = 0 ;j<s[i].size();j++) {
      mp[j+1][hss.get(1, j+1)]=1;
    }
  }
  for(int i = 0;i<L;i++) {
    nxt[i]=i;
    int lo = 1, hi = L-i;
    while(lo <= hi) {
      int mid = (lo+hi)/2;
      if(mp[mid][hs.get(i+1, i+mid)]) {
        nxt[i] = i+mid;
        lo = mid+1;
      }
      else {
        hi=mid-1;
      }
    }
  }
  {
    for(int i = 0;i<L;i++) {
      int curmx = i;
      for(int j = 0;j<L;j++) {
        if(j <= nxt[i] and nxt[j] > nxt[curmx] and j >= i) {
          curmx = j;
        }
      }
      up[i][0] = curmx;
    }
  }
  while(m--) {
    int l, r;
    cin >> l >> r;
    int res = get(l, r);
    cout << res << "\n";
  }

}

Compilation message

Main.cpp: In function 'int main()':
Main.cpp:67:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   67 |     for(int j = 0 ;j<s[i].size();j++) {
      |                    ~^~~~~~~~~~~~
Main.cpp:62:7: warning: unused variable 'idx' [-Wunused-variable]
   62 |   int idx[L];
      |       ^~~

Subtask #1
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1624 KB Output is correct
2 Runtime error 32 ms 18768 KB Execution killed with signal 11
3 Halted 0 ms 0 KB -

Subtask #2
0 / 25.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2076 ms 302320 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #3
0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1624 KB Output is correct
2 Runtime error 32 ms 18768 KB Execution killed with signal 11
3 Halted 0 ms 0 KB -