oj.uz

Submission #250995

# Submission time Handle Problem Language Result Execution time Memory
250995 2020-07-19T19:45:27 Z WhaleVomit Palindromic Partitions (CEOI17_palindromic) C++14
100 / 100
 1091 ms 59972 KB 
#include <bits/stdc++.h>
using namespace std;

#define f first
#define s second
#define pb push_back
#define mp make_pair
#define all(v) v.begin(), v.end()
#define sz(v) (int)v.size()

#define MOO(i, a, b) for(int i=a; i<b; i++)
#define M00(i, a) for(int i=0; i<a; i++)
#define MOOd(i,a,b) for(int i = (b)-1; i >= a; i--)
#define M00d(i,a) for(int i = (a)-1; i>=0; i--)

#define FAST ios::sync_with_stdio(0); cin.tie(0);
#define finish(x) return cout << x << '\n', 0;
#define dbg(x) cerr << ">>> " << #x << " = " << x << "\n";
#define _ << " _ " <<

template<class T> bool ckmin(T& a, const T& b) {return b < a ? a = b, 1 : 0;}
template<class T> bool ckmax(T& a, const T& b) {return a < b ? a = b, 1 : 0;}

typedef long long ll;
typedef long double ld;
typedef vector<int> vi;
typedef pair<int,int> pi;
typedef pair<ld,ld> pd;
typedef complex<ld> cd;

template<int SZ> struct rabinKarp {
    const ll mods[3] = {1000000007, 999119999, 1000992299};
    ll p[3][SZ];
    ll h[3][SZ];
    const ll base = 1000696969;
    rabinKarp() {}
    void build(string a) {
        M00(i, 3) {
            p[i][0] = 1;
            h[i][0] = (int)a[0];
            MOO(j, 1, (int)a.length()) {
                p[i][j] = (p[i][j-1] * mods[i]) % base;
                h[i][j] = (h[i][j-1] * mods[i] + (int)a[j]) % base;
            }
        }
    }
    tuple<ll, ll, ll> hsh(int a, int b) {
        if(a == 0) return make_tuple(h[0][b], h[1][b], h[2][b]);
        tuple<ll, ll, ll> ans;
        get<0>(ans) = (((h[0][b] - h[0][a-1]*p[0][b-a+1]) % base) + base) % base;
        get<1>(ans) = (((h[1][b] - h[1][a-1]*p[1][b-a+1]) % base) + base) % base;
        get<2>(ans) = (((h[2][b] - h[2][a-1]*p[2][b-a+1]) % base) + base) % base;
        return ans;
    }
};

const int MAX_N = 1000010;
rabinKarp<MAX_N> rk;

int main() { FAST
    int t; cin >> t;
    while(t--) {
        string s; cin >> s;
        rk.build(s);
        int last = 0;
        int cnt = 0;
        M00(i, sz(s)/2) {
            if(rk.hsh(last, i) == rk.hsh(sz(s)-1-i, sz(s)-1-last)) {
                cnt++;
                last = i+1;
            }
        }
        int res = 2*cnt+1;
        if(sz(s)%2 == 0 && last == sz(s)/2) res--;
        cout << res << "\n";
    }
}

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 384 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 0 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 384 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 0 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 1 ms 384 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 1 ms 384 KB Output is correct

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 384 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 0 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 1 ms 384 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 1 ms 384 KB Output is correct
10 Correct 11 ms 1024 KB Output is correct
11 Correct 7 ms 896 KB Output is correct
12 Correct 12 ms 1024 KB Output is correct
13 Correct 10 ms 896 KB Output is correct

Subtask #4
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 384 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 0 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 1 ms 384 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 1 ms 384 KB Output is correct
10 Correct 11 ms 1024 KB Output is correct
11 Correct 7 ms 896 KB Output is correct
12 Correct 12 ms 1024 KB Output is correct
13 Correct 10 ms 896 KB Output is correct
14 Correct 1080 ms 59972 KB Output is correct
15 Correct 538 ms 54772 KB Output is correct
16 Correct 1091 ms 59004 KB Output is correct
17 Correct 605 ms 31856 KB Output is correct