oj.uz

Submission #847203

# Submission time Handle Problem Language Result Execution time Memory
847203 2023-09-09T09:30:05 Z Pacybwoah Palindromi (COCI22_palindromi) C++17
10 / 110
 1000 ms 4032 KB 
#pragma GCC optimize("O3","unroll-loops")
#include<iostream>
#include<algorithm>
#include<vector>
#include<utility>
#include<set>
#include<string>
using namespace std;
#define ll long long
vector<int> dsu;
const ll mod=998244353;
vector<string> vec;
void build(int n){
    dsu.resize(n+1);
    for(int i=1;i<=n;i++) dsu[i]=i;
}
int query(int x){
    if(x==dsu[x]) return x;
    int tmp=query(dsu[x]);
    dsu[x]=tmp;
    return tmp;
}
void unite(int a,int b){
    a=query(a),b=query(b);
    if(a==b) return;
    vec[a]+=vec[b];
    dsu[b]=a;
}
int main(){
    ios::sync_with_stdio(false);
    cin.tie(0);
    int n;
    cin>>n;
    string s;
    cin>>s;
    build(n);
    vec.resize(n+1,"");
    for(int i=0;i<n;i++) vec[i+1]+=s[i];
    int a,b;
    vector<ll> bases(1005);
    bases[0]=1;
    for(int i=1;i<1005;i++) bases[i]=bases[i-1]*3%mod;
    for(int i=1;i<n;i++){
        cin>>a>>b;
        unite(a,b);
        string now=vec[query(a)];
        int sz=now.size();
        vector<ll> hash(sz+1),rev(sz+1);
        hash[0]=1,rev[0]=1;
        for(int i=1;i<=sz;i++){
            hash[i]=(hash[i-1]*3%mod+(now[i-1]-'0'+1))%mod;
            rev[i]=(rev[i-1]*3%mod+(now[sz-i]-'0'+1))%mod;
        }
        set<ll> s;
        for(int i=1;i<=sz;i++){
            for(int j=i;j<=sz;j++){
                if((mod+hash[j]-hash[i-1]*bases[j-i+1]%mod)%mod==(mod+rev[sz-i+1]-rev[sz-j]*bases[j-i+1]%mod)%mod){
                    s.insert((mod+hash[j]-hash[i-1]*bases[j-i+1]%mod)%mod);
                }
            }
        }
        cout<<s.size()<<"\n";
        //or(auto x:s) cout<<x<<" ";
    }
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 2 ms 348 KB Output is correct
7 Correct 2 ms 348 KB Output is correct
8 Correct 2 ms 348 KB Output is correct
9 Correct 2 ms 344 KB Output is correct
10 Correct 4 ms 348 KB Output is correct
11 Correct 2 ms 344 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 1 ms 344 KB Output is correct

Subtask #2
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 2 ms 348 KB Output is correct
7 Correct 2 ms 348 KB Output is correct
8 Correct 2 ms 348 KB Output is correct
9 Correct 2 ms 344 KB Output is correct
10 Correct 4 ms 348 KB Output is correct
11 Correct 2 ms 344 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 1 ms 344 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 876 ms 600 KB Output is correct
16 Correct 136 ms 596 KB Output is correct
17 Correct 314 ms 628 KB Output is correct
18 Correct 217 ms 596 KB Output is correct
19 Execution timed out 1066 ms 844 KB Time limit exceeded
20 Halted 0 ms 0 KB -

Subtask #3
0 / 30.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1055 ms 4032 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #4
0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 2 ms 348 KB Output is correct
7 Correct 2 ms 348 KB Output is correct
8 Correct 2 ms 348 KB Output is correct
9 Correct 2 ms 344 KB Output is correct
10 Correct 4 ms 348 KB Output is correct
11 Correct 2 ms 344 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 1 ms 344 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 876 ms 600 KB Output is correct
16 Correct 136 ms 596 KB Output is correct
17 Correct 314 ms 628 KB Output is correct
18 Correct 217 ms 596 KB Output is correct
19 Execution timed out 1066 ms 844 KB Time limit exceeded
20 Halted 0 ms 0 KB -