oj.uz

Submission #1110018

# Submission time Handle Problem Language Result Execution time Memory
1110018 2024-11-08T13:05:19 Z cpptowin Palindromic Partitions (CEOI17_palindromic) C++17
100 / 100
 100 ms 28800 KB 
#include <bits/stdc++.h>
#define fo(i, d, c) for (int i = d; i <= c; i++)
#define fod(i, c, d) for (int i = c; i >= d; i--)
#define maxn 1000010
#define N 1010
#define fi first
#define se second
#define pb emplace_back
#define en cout << "\n";
#define int long long
#define inf (int)1e18
#define bitcout(x) __builtin_popcountll(x)
#define pii pair<int, int>
#define vii vector<pii>
#define lb(x) x & -x
#define bit(i, j) ((i >> j) & 1)
#define offbit(i, j) (i ^ (1LL << j))
#define onbit(i, j) (i | (1LL << j))
#define vi vector<int>
#define all(x) x.begin(), x.end()
#define ss(x) (int)x.size()
#define UNIQUE(v) v.erase(unique(all(v)),v.end())
template <typename T1, typename T2>
bool minimize(T1 &a, T2 b)
{
    if (a > b)
    {
        a = b;
        return true;
    }
    return false;
}
template <typename T1, typename T2>
bool maximize(T1 &a, T2 b)
{
    if (a < b)
    {
        a = b;
        return true;
    }
    return false;
}
using namespace std;
const int nsqrt = 450;
const int mod = 1e9 + 7;
void add(int &x, int k)
{
    x += k;
    if (x >= mod)
        x -= mod;
}
const int base = 311;
int h[maxn],p[maxn];
string s;
int n;
int get(int l,int r) 
{
    return (h[r] - h[l - 1] * p[r - l + 1] + mod * mod) % mod;
}
void solve()
{
    cin >> s;
    int n = ss(s);
    s = ' ' + s;
    fo(i,1,n)
    {
        h[i] = (h[i - 1] * base + s[i] - 'a' + 1) % mod;
    }
    int l = 1,r = n;
    int cnt = 0;
    while(l <= r) 
    {
        int posl = l,posr = r;
        bool ok = 0;
        while(posl < posr) 
        {
            if(get(l,posl) == get(posr,r))
            {
                cnt += 2;
                ok = 1;
                l = posl + 1;
                r = posr - 1;
                break;
            }
            posl++;
            posr--;
        }
        if(!ok) 
        {
            cnt++;
            break;
        }
    }
    cout << cnt;en;
}
main()
{
#define name "TASK"
    if (fopen(name ".inp", "r"))
    {
        freopen(name ".inp", "r", stdin);
        freopen(name ".out", "w", stdout);
    }
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    p[0] = 1;
    fo(i,1,maxn - 1) p[i] = p[i - 1] * base % mod;
    int T;
    cin >> T;
    while (T--)
        solve();
}

Compilation message

palindromic.cpp:96:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   96 | main()
      | ^~~~
palindromic.cpp: In function 'int main()':
palindromic.cpp:101:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  101 |         freopen(name ".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
palindromic.cpp:102:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  102 |         freopen(name ".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 8784 KB Output is correct
2 Correct 7 ms 8784 KB Output is correct
3 Correct 7 ms 8784 KB Output is correct
4 Correct 7 ms 8784 KB Output is correct
5 Correct 7 ms 8784 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 8784 KB Output is correct
2 Correct 7 ms 8784 KB Output is correct
3 Correct 7 ms 8784 KB Output is correct
4 Correct 7 ms 8784 KB Output is correct
5 Correct 7 ms 8784 KB Output is correct
6 Correct 6 ms 8784 KB Output is correct
7 Correct 6 ms 8784 KB Output is correct
8 Correct 7 ms 8784 KB Output is correct
9 Correct 6 ms 8784 KB Output is correct

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 8784 KB Output is correct
2 Correct 7 ms 8784 KB Output is correct
3 Correct 7 ms 8784 KB Output is correct
4 Correct 7 ms 8784 KB Output is correct
5 Correct 7 ms 8784 KB Output is correct
6 Correct 6 ms 8784 KB Output is correct
7 Correct 6 ms 8784 KB Output is correct
8 Correct 7 ms 8784 KB Output is correct
9 Correct 6 ms 8784 KB Output is correct
10 Correct 8 ms 8996 KB Output is correct
11 Correct 8 ms 8784 KB Output is correct
12 Correct 7 ms 8784 KB Output is correct
13 Correct 8 ms 8868 KB Output is correct

Subtask #4
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 8784 KB Output is correct
2 Correct 7 ms 8784 KB Output is correct
3 Correct 7 ms 8784 KB Output is correct
4 Correct 7 ms 8784 KB Output is correct
5 Correct 7 ms 8784 KB Output is correct
6 Correct 6 ms 8784 KB Output is correct
7 Correct 6 ms 8784 KB Output is correct
8 Correct 7 ms 8784 KB Output is correct
9 Correct 6 ms 8784 KB Output is correct
10 Correct 8 ms 8996 KB Output is correct
11 Correct 8 ms 8784 KB Output is correct
12 Correct 7 ms 8784 KB Output is correct
13 Correct 8 ms 8868 KB Output is correct
14 Correct 100 ms 27780 KB Output is correct
15 Correct 61 ms 23032 KB Output is correct
16 Correct 97 ms 28800 KB Output is correct
17 Correct 55 ms 18908 KB Output is correct