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Submission #915774

# Submission time Handle Problem Language Result Execution time Memory
915774 2024-01-24T17:03:30 Z Captain_Georgia Palindromic Partitions (CEOI17_palindromic) C++17
100 / 100
 145 ms 18996 KB 
#include <bits/stdc++.h>
 
using namespace std;
 
/// toto -> 1
 
#define pb push_back
#define pii pair<int,int>
#define pll pair<ll,ll>
#define io                      \
    ios_base::sync_with_stdio(0); \
    cin.tie(0);                   \
    cout.tie(0);
#define all(a) a.begin(),a.end()
#define rep(k,i,n) for(ll k=i;k<n;k++)
#define repp(k,i,n) for(ll k=n-1;k>=i;k--)
#define rech(k) for(char k='a';k<='z';k++)
#define SZ(a) (int)a.size()
#define MX(a) *max_element(all(a))
#define MN(a) *min_element(all(a))
#define SM(a) accumulate(all(a),0LL)
#define vi vector<int>
#define vl vector<long long>
#define vvl vector<vector<long long>>
#define vvi vector<vector<int>>
#define fii first
#define see second
 
/// toto -> 
const long long mod = 1e9 + 7 , modd = 998244353;
 
 
typedef long long ll;
 
void F1(bool res) {
    if(res) {
        cout<<"Yes\n" ;
    }
    else {
        cout<<"No\n" ;
    }
}
 
struct mint{
    ll val;
 
    mint(int64_t v = 0) {
        v %= mod;
        if (v < 0) v += mod;
        val = v;
    }
 
    mint& operator+=(const mint& other) {
        val += other.val;
        if (val >= mod) val -= mod;
        return *this;
    }
 
    mint& operator-=(const mint& other) {
        val += mod - other.val;
        if (val >= mod) val -= mod;
        return *this;
    }
 
    mint& operator*=(const mint& other) {
        val = (int64_t)val * other.val % mod;
        return *this;
    }
 
    mint& operator/=(const mint& other) {
        return *this *= other.inv();
    }
 
    friend mint operator+(mint a, const mint& b) { return a += b; }
    friend mint operator-(mint a, const mint& b) { return a -= b; }
    friend mint operator*(mint a, const mint& b) { return a *= b; }
    friend mint operator/(mint a, const mint& b) { return a /= b; }
 
    mint pow(int64_t exp) const {
        mint a = *this, res = 1;
        while (exp > 0) {
            if (exp & 1)
                res *= a;
            a *= a;
            exp >>= 1;
        }
        return res;
    }
 
    mint inv() const {
        assert(val != 0);
        return pow(mod - 2);
    }
 
    friend ostream& operator<<(ostream& os, const mint& m) {
        return os << m.val;
    }
};
 
ll bp(ll n,ll m){
    if(m == 0){
        return 1;
    }
    if(m == 1){
        return n%mod;
    }
    if(m%2==0){
        return bp(n*n%mod,m/2)%mod;
    }
    return n*bp(n,m-1)%mod;
}
 
 
/// toto -> 3
 
const int N = 2e5 + 9, M = 1e6 + 434, inf = 1e9 + 99;
const ll inff = 1e10;


void solve() {
	string s;
	cin >> s;
	int n = s.size();

	ll B = 47;
	vector<ll> p(n+1 , 0), pre(n+1 , 0);
	p[0] = 1; 
	pre[0] = 0;
	
	for (int i = 0; i < n; i++) {
		p[i+1] = (p[i] * B) % mod;
		pre[i+1] = (pre[i] * B + (s[i] - 'a' + 1)) % mod;
	}

	int l = 0, r = n, ans = 0;
	while (l < r) {
		int k = 0;
		ll hs1 = 0, hs2 = 1;
		while (hs1 != hs2) {
			k++;
			hs1 = pre[l+k] - (pre[l] * p[k]) % mod;
			hs2 = pre[r] - (pre[r - k] * p[k]) % mod;
			hs1 = (hs1 + mod)%mod;
			hs2 = (hs2 + mod)%mod;
		}
		ans ++;
		if(r - l != k) {
			ans++;
		}
		l += k;
		r -= k;
	}

	cout << ans << '\n';
}

int32_t main() {
	
	
    io;
    
    ll t=1;
       cin >> t;
    rep(_,1,t+1) {
		///cerr << "Start of test case: " << _ << "\n";
        ///cout<<"Case #"<<_<<": ";
        solve();
        ///cerr << "\n";
        ///cerr << "\n";
    }
    return 0;
 
}

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 ms 344 KB Output is correct

Subtask #2
20.0 / 20.0

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

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 2 ms 620 KB Output is correct
11 Correct 1 ms 604 KB Output is correct
12 Correct 2 ms 612 KB Output is correct
13 Correct 1 ms 600 KB Output is correct

Subtask #4
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 2 ms 620 KB Output is correct
11 Correct 1 ms 604 KB Output is correct
12 Correct 2 ms 612 KB Output is correct
13 Correct 1 ms 600 KB Output is correct
14 Correct 145 ms 18900 KB Output is correct
15 Correct 82 ms 18792 KB Output is correct
16 Correct 145 ms 18996 KB Output is correct
17 Correct 74 ms 10208 KB Output is correct