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Submission #318175

# Submission time Handle Problem Language Result Execution time Memory
318175 2020-10-31T15:05:07 Z RohamIzadidoost Palindromic Partitions (CEOI17_palindromic) C++14
100 / 100
 78 ms 9352 KB 
#pragma GCC optimize("O2")
#include<bits/stdc++.h>
typedef long long ll ;
#define pll pair<ll , ll >
#define X   first
#define Y   second
#define mp  make_pair
#define pii pair<int , int>
#define vec vector
#define file_io freopen("input.txt", "r", stdin);freopen("output.txt", "w", stdout);
#define migmig ios::sync_with_stdio(false);cin.tie(0);cout.tie(0);
#define pb push_back
using namespace std;
const int maxn = 1000*1000+5 ;
const ll inf = 9223372036854775807 ;
const ll mod = 1000696969 ;
const ll mod2 = 1e9 + 7 ; 
const ll H = 1777013 ;
string s  ; 
ll pt[maxn] , h[maxn]  , L , R , sz , n  , l, r  , mid , b   , ans   , lh , rh , cnt  ;

ll hsh(int l , int r){
	if(l == 0 ) return h[r] ; 
	return ( h[r] - h[l-1] * pt[r-l+1] % mod  + mod ) % mod ;  }
 
bool check(int x){
	return( hsh(L , L + x - 1) == hsh(R - x + 1 , R) ) ; 
}
int Main()
{
	ans = 0 ; 
	cin>>s ; n = s.size() ; 
	L= 0 , R = n - 1 ;  lh = 0 , rh = 0 ; 
	cnt = 0 ; 
	for( ; L < R ; L++ , R-- , cnt++){
		lh = (lh * H % mod + s[L]) % mod , rh = (rh + pt[cnt] * s[R] % mod ) % mod ; 
	//	cout<<L <<" " << R <<" " << lh <<" " << rh << endl ; 
		if(lh == rh)
		{
			ans += 2 ; 
			lh = rh = cnt = 0 ; cnt = -1 ; 
		}
	}
	if(n % 2 == 1 || lh != rh)
	ans ++ ; 
	cout<<ans << endl ; 
	return 0 ; 
}

int main()
{
	int t ; 
	migmig; 
	pt[0] = 1 ; 
	for(int i = 1; i < maxn ; i ++ )
	{
		pt[i] = pt[i-1] * H % mod ; 
	}
	cin>> t ; 
	while(t--)
	{
		Main() ; 
	}
}

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 8172 KB Output is correct
2 Correct 10 ms 8172 KB Output is correct
3 Correct 10 ms 8172 KB Output is correct
4 Correct 9 ms 8172 KB Output is correct
5 Correct 9 ms 8172 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 8172 KB Output is correct
2 Correct 10 ms 8172 KB Output is correct
3 Correct 10 ms 8172 KB Output is correct
4 Correct 9 ms 8172 KB Output is correct
5 Correct 9 ms 8172 KB Output is correct
6 Correct 9 ms 8172 KB Output is correct
7 Correct 9 ms 8172 KB Output is correct
8 Correct 10 ms 8172 KB Output is correct
9 Correct 10 ms 8172 KB Output is correct

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 8172 KB Output is correct
2 Correct 10 ms 8172 KB Output is correct
3 Correct 10 ms 8172 KB Output is correct
4 Correct 9 ms 8172 KB Output is correct
5 Correct 9 ms 8172 KB Output is correct
6 Correct 9 ms 8172 KB Output is correct
7 Correct 9 ms 8172 KB Output is correct
8 Correct 10 ms 8172 KB Output is correct
9 Correct 10 ms 8172 KB Output is correct
10 Correct 10 ms 8172 KB Output is correct
11 Correct 10 ms 8172 KB Output is correct
12 Correct 10 ms 8172 KB Output is correct
13 Correct 10 ms 8172 KB Output is correct

Subtask #4
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 8172 KB Output is correct
2 Correct 10 ms 8172 KB Output is correct
3 Correct 10 ms 8172 KB Output is correct
4 Correct 9 ms 8172 KB Output is correct
5 Correct 9 ms 8172 KB Output is correct
6 Correct 9 ms 8172 KB Output is correct
7 Correct 9 ms 8172 KB Output is correct
8 Correct 10 ms 8172 KB Output is correct
9 Correct 10 ms 8172 KB Output is correct
10 Correct 10 ms 8172 KB Output is correct
11 Correct 10 ms 8172 KB Output is correct
12 Correct 10 ms 8172 KB Output is correct
13 Correct 10 ms 8172 KB Output is correct
14 Correct 75 ms 9352 KB Output is correct
15 Correct 50 ms 9344 KB Output is correct
16 Correct 78 ms 9344 KB Output is correct
17 Correct 42 ms 9344 KB Output is correct