oj.uz

Submission #45290

# Submission time Handle Problem Language Result Execution time Memory
45290 2018-04-12T14:44:41 Z nickyrio Palindromic Partitions (CEOI17_palindromic) C++17
100 / 100
 170 ms 19828 KB 
#include <bits/stdc++.h>
#define FOR(i, a, b) for (int i = (a); i <= (b); ++i)
#define FORD(i, a, b) for (int i = (a); i >= (b); --i)
#define REP(i, a) for (int i = 0; i < (a); ++i)
#define DEBUG(x) { cerr << #x << '=' << x << endl; }
#define Arr(a, l, r) { cerr << #a << " = {"; FOR(_, l, r) cerr << ' ' << a[_]; cerr << "}\n"; }
#define N 1001000
#define pp pair<int, int>
#define endl '\n'
#define IO ios::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL)
#define taskname ""
#define bit(S, i) (((S) >> (i)) & 1)
using namespace std;

const long long MOD = 1e9 + 7, base = 29;
string st;
int n;
long long Hash[N], POW[N];

void InitHash() {
    Hash[0] = 0;
    FOR(i, 1, n) Hash[i] = (Hash[i - 1] * base + st[i] - 'a') % MOD;
}

long long GetHash(int i, int j) {
    return (Hash[j] - Hash[i - 1] * POW[j - i + 1] % MOD + MOD * MOD) % MOD;
}

int Go(int l, int r) {
    //DEBUG(l);DEBUG(r);
    if (l == r) return 1;
    if (l > r) return 0;
    FOR(len, 1, r - l + 1) {
        if (l + len - 1 >= r - len + 1) break;
        //DEBUG(len);
        //DEBUG(GetHash(l, l + len - 1));
        //DEBUG(GetHash(r - len + 1, r));
        if (GetHash(l, l + len - 1) == GetHash(r - len + 1, r)) return 2 + Go(l + len, r - len);
    }
    return 1;
}

void solve() {
    cin >> st;
    n = st.size();
    st = '~' + st;
    InitHash();
    cout << Go(1, n) << '\n';
}
int main() {
    #ifdef NERO
    freopen("test.inp","r",stdin);
    freopen("test.out","w",stdout);
    double stime = clock();
    #else 
        //freopen(taskname".inp","r",stdin);
        //freopen(taskname".out","w",stdout);
    #endif //NERO
    IO;
    POW[0] = 1;
    FOR(i, 1, N - 1) POW[i] = POW[i - 1] * base % MOD;
    int test;
    cin >> test;
    while (test--) solve();
    #ifdef NERO
    double etime = clock();
    cerr << "Execution time: " << (etime - stime) / CLOCKS_PER_SEC * 1000 << " ms.\n";
    #endif // NERO
}

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 8184 KB Output is correct
2 Correct 13 ms 8184 KB Output is correct
3 Correct 13 ms 8220 KB Output is correct
4 Correct 13 ms 8236 KB Output is correct
5 Correct 14 ms 8236 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 8184 KB Output is correct
2 Correct 13 ms 8184 KB Output is correct
3 Correct 13 ms 8220 KB Output is correct
4 Correct 13 ms 8236 KB Output is correct
5 Correct 14 ms 8236 KB Output is correct
6 Correct 13 ms 8308 KB Output is correct
7 Correct 13 ms 8320 KB Output is correct
8 Correct 13 ms 8320 KB Output is correct
9 Correct 13 ms 8320 KB Output is correct

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 8184 KB Output is correct
2 Correct 13 ms 8184 KB Output is correct
3 Correct 13 ms 8220 KB Output is correct
4 Correct 13 ms 8236 KB Output is correct
5 Correct 14 ms 8236 KB Output is correct
6 Correct 13 ms 8308 KB Output is correct
7 Correct 13 ms 8320 KB Output is correct
8 Correct 13 ms 8320 KB Output is correct
9 Correct 13 ms 8320 KB Output is correct
10 Correct 15 ms 8448 KB Output is correct
11 Correct 14 ms 8528 KB Output is correct
12 Correct 15 ms 8528 KB Output is correct
13 Correct 15 ms 8528 KB Output is correct

Subtask #4
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 8184 KB Output is correct
2 Correct 13 ms 8184 KB Output is correct
3 Correct 13 ms 8220 KB Output is correct
4 Correct 13 ms 8236 KB Output is correct
5 Correct 14 ms 8236 KB Output is correct
6 Correct 13 ms 8308 KB Output is correct
7 Correct 13 ms 8320 KB Output is correct
8 Correct 13 ms 8320 KB Output is correct
9 Correct 13 ms 8320 KB Output is correct
10 Correct 15 ms 8448 KB Output is correct
11 Correct 14 ms 8528 KB Output is correct
12 Correct 15 ms 8528 KB Output is correct
13 Correct 15 ms 8528 KB Output is correct
14 Correct 165 ms 18220 KB Output is correct
15 Correct 99 ms 18220 KB Output is correct
16 Correct 170 ms 19828 KB Output is correct
17 Correct 99 ms 19828 KB Output is correct