oj.uz

Submission #217863

# Submission time Handle Problem Language Result Execution time Memory
217863 2020-03-31T05:04:21 Z aloo123 Palindromic Partitions (CEOI17_palindromic) C++14
100 / 100
 41 ms 19744 KB 
#include <bits/stdc++.h>
#define ll long long
#define ld long double
#define mp make_pair
#define pb push_back
#define vll vector<ll>
#define endl "\n"
#define pll pair<ll,ll>
#define all(x) (x).begin() , (x).end()
#define f first
#define s second
using namespace std;
 
const ll N =(2e5+5);
const ll MOD = 998244353;
const ll INF = 1e16;
const ll LOG = 29;

long long binpow(long long a, long long b) {
     a %= MOD;
    long long res = 1;
    while (b > 0) {
        if (b & 1)
            res = (res * a)%MOD ;
        a = (a * a)%MOD ;
        b >>= 1;
    }
    res%=MOD;
    return res;
}
ll pp[1000005];

void solve(){
    string s;
    cin>>s;
    ll n = (ll)s.size();
    //cout<<n<<endl;
    ll l= 0,r= n -1;
    ll a=0;
    ll b=0;
    ll ans = 0;
    ll x=-1,y=n;
    ll lol = 0,gg=n-1;

    while(l < r){
        a = a * LOG + (s[l]-'a'+1); // 4
        b += pp[gg-r] * (s[r] - 'a' + 1);//  
       // cout<<l<<" "<<r<<" --> " << a<< " "<<b<<endl;
        if(b == a){
            ans += 2;
            a=0;
            b=0;
            x = l,y =r;
            lol = l-1,gg = r-1;
            
        }

        l++,r--;
    }
    if((x+1)<=(y-1))
    ans++;
    cout<<ans<<endl;
}

int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(NULL);
    pp[0] = 1;
    for(int i =1;i<=1000000;i++)pp[i] = (pp[i-1] * LOG);
    ll t;cin>>t;

    

    while(t--){
        solve();
    }



    return 0;     
    
        
}

Compilation message

palindromic.cpp: In function 'void solve()':
palindromic.cpp:43:8: warning: variable 'lol' set but not used [-Wunused-but-set-variable]
     ll lol = 0,gg=n-1;
        ^~~

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 8192 KB Output is correct
2 Correct 9 ms 8192 KB Output is correct
3 Correct 10 ms 8192 KB Output is correct
4 Correct 10 ms 8192 KB Output is correct
5 Correct 9 ms 8212 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 8192 KB Output is correct
2 Correct 9 ms 8192 KB Output is correct
3 Correct 10 ms 8192 KB Output is correct
4 Correct 10 ms 8192 KB Output is correct
5 Correct 9 ms 8212 KB Output is correct
6 Correct 10 ms 8192 KB Output is correct
7 Correct 10 ms 8192 KB Output is correct
8 Correct 10 ms 8192 KB Output is correct
9 Correct 10 ms 8192 KB Output is correct

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 8192 KB Output is correct
2 Correct 9 ms 8192 KB Output is correct
3 Correct 10 ms 8192 KB Output is correct
4 Correct 10 ms 8192 KB Output is correct
5 Correct 9 ms 8212 KB Output is correct
6 Correct 10 ms 8192 KB Output is correct
7 Correct 10 ms 8192 KB Output is correct
8 Correct 10 ms 8192 KB Output is correct
9 Correct 10 ms 8192 KB Output is correct
10 Correct 10 ms 8320 KB Output is correct
11 Correct 10 ms 8192 KB Output is correct
12 Correct 10 ms 8320 KB Output is correct
13 Correct 10 ms 8320 KB Output is correct

Subtask #4
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 8192 KB Output is correct
2 Correct 9 ms 8192 KB Output is correct
3 Correct 10 ms 8192 KB Output is correct
4 Correct 10 ms 8192 KB Output is correct
5 Correct 9 ms 8212 KB Output is correct
6 Correct 10 ms 8192 KB Output is correct
7 Correct 10 ms 8192 KB Output is correct
8 Correct 10 ms 8192 KB Output is correct
9 Correct 10 ms 8192 KB Output is correct
10 Correct 10 ms 8320 KB Output is correct
11 Correct 10 ms 8192 KB Output is correct
12 Correct 10 ms 8320 KB Output is correct
13 Correct 10 ms 8320 KB Output is correct
14 Correct 38 ms 17712 KB Output is correct
15 Correct 26 ms 15668 KB Output is correct
16 Correct 41 ms 19744 KB Output is correct
17 Correct 30 ms 14820 KB Output is correct